CN-121976182-A - Preparation method and system of calcium-phosphorus coating based on laser deposition

CN121976182ACN 121976182 ACN121976182 ACN 121976182ACN-121976182-A

Abstract

The invention relates to the technical field of biological coating preparation, in particular to a preparation method and a system of a calcium-phosphorus coating based on laser deposition, wherein the preparation method comprises the following steps: pretreating a substrate to be treated in a coating preparation environment to obtain a pretreated substrate, obtaining calcium-phosphorus precursor slurry by using a coating substrate set, carrying out laser melting on the pretreated substrate and the calcium-phosphorus precursor slurry to obtain a molten calcium-phosphorus layer, carrying out cooling crystallization on the molten calcium-phosphorus layer to obtain a target coating, carrying out quality detection on the target coating to obtain a detection result, obtaining an abnormal type if the detection result is unqualified, adjusting and preparing the target coating based on the abnormal type to obtain a qualified coating, and taking the target coating as the qualified coating if the detection result is qualified. The invention can improve the high efficiency and stability of the preparation of the calcium-phosphorus coating.

Inventors

Ran Tianfei
ZHANG HUAN
WANG MIN
PENG YUPU
LI JIE
LIU ZAIYANG
Ma tianying
KE SONG

Assignees

中国人民解放军陆军军医大学第二附属医院

Dates

Publication Date: 20260505
Application Date: 20260120

Claims (10)

1. A method for preparing a calcium-phosphorus coating based on laser deposition, which is characterized by comprising the following steps: Receiving a coating preparation instruction, and identifying a coating preparation environment based on the coating preparation instruction, wherein the coating preparation environment comprises a substrate to be treated and a coating substrate set; Pretreating a substrate to be treated in a coating preparation environment to obtain a pretreated substrate; Obtaining calcium-phosphorus precursor slurry by using a coating substrate set; Carrying out laser melting by using the pretreated matrix and the calcium-phosphorus precursor slurry to obtain a molten calcium-phosphorus layer; Cooling and crystallizing the molten calcium-phosphorus layer to obtain a target coating; Detecting the quality of the target coating to obtain a detection result, wherein the detection result is qualified or unqualified; If the detection result is unqualified, acquiring an abnormal type, wherein the abnormal type is roughness abnormality, abnormal thickness of a heat-affected layer or total abnormality, and adjusting and preparing the target coating based on the abnormal type to obtain a qualified coating; and if the detection result is qualified, taking the target coating as a qualified coating.
2. The method for preparing a calcium-phosphorus coating based on laser deposition according to claim 1, wherein the pretreatment of the substrate to be treated in the coating preparation environment to obtain a pretreated substrate comprises: removing surface impurities from the substrate to be treated to obtain a primary treated substrate; Ultrasonic cleaning is carried out on the primary treatment matrix to obtain a cleaned matrix; Deionized water cleaning is carried out on the cleaned substrate to obtain a secondary cleaning substrate; Nitrogen drying is carried out on the secondary cleaning matrix to obtain a target dry matrix; gradient polishing is carried out on the target dry matrix to obtain a polished matrix; Pickling the polished substrate to obtain a pickled substrate; and drying the acid-washed matrix to obtain a pretreated matrix.
3. The method for preparing a calcium-phosphorus coating based on laser deposition according to claim 2, wherein the obtaining a calcium-phosphorus precursor slurry using a set of coating substrates comprises: Obtaining hydroxyapatite, tricalcium phosphate powder and tetracalcium phosphate powder based on the coating substrate set; mixing hydroxyapatite, tricalcium phosphate powder and tetracalcium phosphate powder according to a plurality of preset mass ratios to obtain a plurality of groups of candidate mixed powder, wherein the candidate mixed powder corresponds to the mass ratio one by one; the following is performed for each of the sets of candidate mixed powders: Ball milling is carried out on the candidate mixed powder to obtain ball-milled powder; mixing the pre-confirmed deionized water with the ball-milled powder according to a preset solid-to-liquid ratio to obtain a primary mixed system; Adding a pre-confirmed dispersing agent into the primary mixed system to obtain a dispersion candidate system; Carrying out ultrasonic dispersion on the dispersion candidate system to obtain candidate slurry; Performing slurry performance test on the candidate slurry to obtain performance scores; summarizing the performance scores to obtain a plurality of performance scores; a calcium-phosphorus precursor slurry is obtained based on the plurality of performance scores.
4. A method of preparing a laser deposition based calcium-phosphorus coating according to claim 3, wherein the performing a slurry performance test on the candidate slurry to obtain a performance score comprises: obtaining a viscosity value of the candidate slurry by using a pre-confirmed rheometer and a preset shear rate; Obtaining the average particle size of the candidate slurry by using a pre-confirmed laser particle size analyzer; performing laser treatment by using the candidate slurry and preset simulated laser parameters to obtain a test coating; obtaining the tensile bonding strength of the test coating; Calculating a performance score based on the viscosity value, the average particle size and the tensile bond strength, wherein the performance score is calculated as follows: Wherein, the Representing a performance score of the vehicle, The viscosity value is indicated as such, Indicating a preset reference value of the standard viscosity, Represents a preset reference value of the standard particle diameter, Represents the average particle size of the particles, The tensile bond strength is indicated as such, Representing a preset reference value of standard bond strength, Indicating a preset viscosity weighting factor, the viscosity of the mixture, Indicating a preset particle size weighting factor, Representing a preset intensity weighting factor.
5. The method for preparing a calcium-phosphorus coating based on laser deposition according to claim 4, wherein the step of performing laser melting by using the pretreated substrate and the calcium-phosphorus precursor slurry to obtain a molten calcium-phosphorus layer comprises the steps of: Obtaining a plurality of groups of laser processing parameters; The following is performed for each of the plurality of sets of laser processing parameters: acquiring a dry film sample based on the calcium-phosphorus precursor slurry and a pre-confirmed standard test substrate; carrying out laser scanning on the dry film sample by utilizing laser processing parameters to obtain a cladding sample; Carrying out cladding quality detection on the cladding sample to obtain cladding quality indexes; summarizing the cladding quality indexes to obtain a plurality of cladding quality indexes; acquiring optimal laser processing parameters based on a plurality of cladding quality indexes, wherein the optimal laser processing parameters comprise optimal laser power and optimal scanning speed; And obtaining the molten calcium-phosphorus layer by using the pretreated matrix, the calcium-phosphorus precursor slurry and the optimal laser processing parameters.
6. The method for preparing a calcium-phosphorus coating based on laser deposition according to claim 5, wherein the step of performing cladding quality detection on the cladding sample to obtain cladding quality index comprises obtaining a surface image by using a pre-confirmed optical microscope and the cladding sample; Graying treatment is carried out on the surface image to obtain a gray image; Binarizing the gray level image to obtain a binarized image; Acquiring a defect communication area and an image total area based on the binarized image; acquiring a defect area occupation ratio based on the defect communication area and the total image area; Obtaining a metallographic sample of the cladding sample; acquiring a section microscopic image of the metallographic specimen by using a pre-confirmed metallographic microscope; acquiring section porosity by using a section microscopic image; Calculating a cladding quality index by using the defect area occupation ratio and the section porosity, wherein the calculation formula of the cladding quality index is as follows: Wherein, the The method is used for representing the cladding quality index, Representing a preset defect area duty cycle weighting factor, Representing a preset pore weight coefficient of the porous ceramic material, Indicating the area-to-defect ratio, Representing the cross-sectional porosity.
7. The method for preparing a calcium-phosphorus coating based on laser deposition according to claim 6, wherein the step of cooling and crystallizing the molten calcium-phosphorus layer to obtain the target coating comprises the steps of: Cooling the molten calcium-phosphorus layer by utilizing the pre-confirmed air flow pressure to obtain a calcium-phosphorus layer in cooling; acquiring a surface roughness set of a calcium-phosphorus layer in cooling according to a preset acquisition time interval; Acquiring a roughness change gradient sequence based on the surface roughness set, wherein the roughness change gradient sequence comprises a plurality of roughness change gradients; absolute values of a plurality of roughness change gradients in the roughness change gradient sequence are obtained; comparing the absolute values of the roughness change gradients with a preset gradient threshold; If the roughness change gradient absolute value larger than the gradient threshold exists in the roughness change gradient absolute values, adjusting the air flow pressure according to a preset adjusting step length to obtain an optimized air flow pressure; Returning the optimized air flow pressure as the air flow pressure to the step of cooling the molten calcium-phosphorus layer by utilizing the pre-confirmed air flow pressure until no roughness change gradient absolute value larger than the gradient threshold value exists in a plurality of roughness change gradient absolute values; And if the roughness change gradient absolute value larger than the gradient threshold value does not exist in the roughness change gradient absolute values, acquiring the target coating based on the calcium-phosphorus layer in cooling and the preset target cooling temperature.
8. The method for preparing a calcium-phosphorus coating based on laser deposition according to claim 7, wherein the quality detection of the target coating to obtain a detection result comprises: acquiring a plurality of detection points based on the target coating; Performing surface roughness detection on the target coating by using a pre-confirmed roughness meter and a plurality of detection points to obtain a plurality of roughness detection values; Acquiring a roughness average value based on the plurality of roughness detection values; performing heat-affected layer thickness detection on the target coating by using a pre-confirmed ultrasonic thickness gauge and a plurality of detection points to obtain a plurality of heat-affected layer thicknesses; Obtaining a heat-affected layer thickness average based on the plurality of heat-affected layer thicknesses; comparing the roughness average value with a preset roughness threshold value, and comparing the thickness average value of the heat-affected layer with a preset thickness threshold value; if the roughness average value is larger than the roughness threshold value or the thickness of the heat-affected layer is larger than the thickness threshold value, a detection result is obtained, and the detection result is unqualified; and if the roughness average value is not greater than the roughness threshold value and the thickness of the heat-affected layer is not greater than the thickness threshold value, acquiring a detection result, wherein the detection result is qualified.
9. The method for preparing a calcium-phosphorus coating based on laser deposition according to claim 8, wherein the adjusting preparation of the target coating based on the anomaly type to obtain a qualified coating comprises: If the abnormal type is roughness abnormality, reducing the optimal laser power in the optimal laser processing parameters by using a preset power adjustment step length to obtain reduced laser processing parameters, taking the reduced laser processing parameters as the optimal laser processing parameters, returning to the step of acquiring the molten calcium-phosphorus layer by using the pretreatment matrix, the calcium-phosphorus precursor slurry and the optimal laser processing parameters until the detection result is qualified, and taking the target coating as a qualified coating; if the abnormal type is that the thickness of the heat-affected layer is abnormal, increasing the optimal scanning speed in the optimal laser processing parameters by utilizing a preset scanning speed adjustment step length to obtain the increased laser processing parameters, taking the increased laser processing parameters as the optimal laser processing parameters, and returning to the step of acquiring the molten calcium-phosphorus layer by utilizing the pretreatment matrix, the calcium-phosphorus precursor slurry and the optimal laser processing parameters until the detection result is qualified, and taking the target coating as a qualified coating; If the abnormality type is the total abnormality, reducing the optimal laser power in the optimal laser processing parameters by using the power adjustment step length, increasing the optimal scanning speed in the optimal laser processing parameters by using the scanning speed adjustment step length to obtain comprehensive laser processing parameters, taking the comprehensive laser processing parameters as the optimal laser processing parameters, and returning to the step of obtaining the molten calcium-phosphorus layer by using the pretreatment matrix, the calcium-phosphorus precursor slurry and the optimal laser processing parameters until the detection result is qualified, and taking the target coating as a qualified coating.
10. A calcium-phosphorus coating preparation system based on laser deposition is characterized by comprising a matrix material processing module, a coating preparation module and a coating preparation module, wherein the matrix material processing module is used for receiving a coating preparation instruction and confirming a coating preparation environment based on the coating preparation instruction, and the coating preparation environment comprises a matrix to be processed and a coating substrate set; Pretreating a substrate to be treated in a coating preparation environment to obtain a pretreated substrate; The coating laser preparation module is used for obtaining calcium-phosphorus precursor slurry by utilizing a coating substrate set; Carrying out laser melting by using the pretreated matrix and the calcium-phosphorus precursor slurry to obtain a molten calcium-phosphorus layer; Cooling and crystallizing the molten calcium-phosphorus layer to obtain a target coating; the coating quality detection module is used for detecting the quality of the target coating to obtain a detection result, wherein the detection result is qualified or unqualified; The optimization parameter adjusting module is used for acquiring an abnormal type if the detection result is unqualified, wherein the abnormal type is roughness abnormality, abnormal thickness of a heat-affected layer or total abnormality, and adjusting and preparing the target coating based on the abnormal type to obtain a qualified coating; and if the detection result is qualified, taking the target coating as a qualified coating.

Description

Preparation method and system of calcium-phosphorus coating based on laser deposition Technical Field The invention relates to the technical field of biological coating preparation, in particular to a preparation method and a system of a calcium-phosphorus coating based on laser deposition. Background With the development of the field of biological coating, calcium phosphate coating such as hydroxyapatite and the like is widely coated on the surface of orthopedics and dental metal implants due to excellent biocompatibility and bone-combining ability. The intelligent preparation of the calcium-phosphorus coating is realized by optimizing a full-flow quality control mechanism of slurry, intelligent cladding, controllable cooling and closed-loop feedback. At present, the preparation of the calcium-phosphorus coating is mainly carried out through fixed laser process parameters, and the preparation purpose can be basically realized by adopting a traditional method, but the problems of low coating performance consistency, difficulty in adapting to material fluctuation due to the fixed laser process parameters and easiness in causing coating defects exist. Therefore, optimizing the preparation method of the calcium-phosphorus coating has important significance for improving the preparation efficiency and the use stability of the calcium-phosphorus coating. Disclosure of Invention The invention provides a preparation method of a calcium-phosphorus coating based on laser deposition and a computer readable storage medium, and the main purpose of the preparation method is to improve the high efficiency and stability of the preparation of the calcium-phosphorus coating. In order to achieve the above purpose, the invention provides a preparation method of a calcium-phosphorus coating based on laser deposition, comprising the following steps: Receiving a coating preparation instruction, and identifying a coating preparation environment based on the coating preparation instruction, wherein the coating preparation environment comprises a substrate to be treated and a coating substrate set; Pretreating a substrate to be treated in a coating preparation environment to obtain a pretreated substrate; Obtaining calcium-phosphorus precursor slurry by using a coating substrate set; Carrying out laser melting by using the pretreated matrix and the calcium-phosphorus precursor slurry to obtain a molten calcium-phosphorus layer; Cooling and crystallizing the molten calcium-phosphorus layer to obtain a target coating; Detecting the quality of the target coating to obtain a detection result, wherein the detection result is qualified or unqualified; If the detection result is unqualified, acquiring an abnormal type, wherein the abnormal type is roughness abnormality, abnormal thickness of a heat-affected layer or total abnormality, and adjusting and preparing the target coating based on the abnormal type to obtain a qualified coating; and if the detection result is qualified, taking the target coating as a qualified coating. Optionally, the pretreatment of the substrate to be treated in the coating preparation environment to obtain a pretreated substrate includes: removing surface impurities from the substrate to be treated to obtain a primary treated substrate; Deionized water cleaning is carried out on the cleaned substrate to obtain a secondary cleaning substrate; Nitrogen drying is carried out on the secondary cleaning matrix to obtain a target dry matrix; gradient polishing is carried out on the target dry matrix to obtain a polished matrix; Pickling the polished substrate to obtain a pickled substrate; and drying the acid-washed matrix to obtain a pretreated matrix. Optionally, the obtaining a calcium-phosphorus precursor slurry using the set of coated substrates comprises: Obtaining hydroxyapatite, tricalcium phosphate powder and tetracalcium phosphate powder based on the coating substrate set; mixing hydroxyapatite, tricalcium phosphate powder and tetracalcium phosphate powder according to a plurality of preset mass ratios to obtain a plurality of groups of candidate mixed powder, wherein the candidate mixed powder corresponds to the mass ratio one by one; the following is performed for each of the sets of candidate mixed powders: Ball milling is carried out on the candidate mixed powder to obtain ball-milled powder; mixing the pre-confirmed deionized water with the ball-milled powder according to a preset solid-to-liquid ratio to obtain a primary mixed system; Adding a pre-confirmed dispersing agent into the primary mixed system to obtain a dispersion candidate system; Carrying out ultrasonic dispersion on the dispersion candidate system to obtain candidate slurry; Performing slurry performance test on the candidate slurry to obtain performance scores; summarizing the performance scores to obtain a plurality of performance scores; a calcium-phosphorus precursor slurry is obtained based on the plurality of performance scores. O