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CN-121976088-A - Multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material and preparation method thereof

CN121976088ACN 121976088 ACN121976088 ACN 121976088ACN-121976088-A

Abstract

The invention belongs to the technical field of metal matrix composite materials, and relates to a multi-scale ceramic phase reinforced 750 ℃ resistant titanium matrix composite material and a preparation method thereof. The composite material is formed by compounding a matrix and multi-scale ceramic, wherein the multi-scale ceramic phase is micron-sized titanium boride and nano-sized lanthanum oxide, the matrix is near alpha-type Ti-Al-Zr-Sn-Mo-Nb-W-Si alloy, the matrix is provided with 6-8 parts by weight of each element, 7-9 parts by weight of Zr, 5-7 parts by weight of Sn and the like, and the accurate regulation and control of the total content of micron TiB and nano La 2 O 3 are realized through quantitative addition and in-situ reaction of LaB 6 (each 0.5% increase of LaB 6 and about 2.3% increase of the total volume fraction of the enhanced phase), and the in-situ generated enhanced phase is firmly combined with the matrix interface without impurity pollution, so that the agglomeration and interface combination problems of externally added ceramic particles are avoided.

Inventors

  • HUANG SHIXING
  • YUE XU
  • YANG ZHONG
  • Aredak Alimas
  • LU JINGJING
  • TONG XIAOLE
  • LUO HENG
  • YE HONGCHUAN

Assignees

  • 新疆湘润新材料科技有限公司
  • 西安工业大学

Dates

Publication Date
20260505
Application Date
20260121

Claims (8)

  1. 1. The multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material is characterized by being formed by compounding a matrix and multi-scale ceramic, wherein the multi-scale ceramic phase is made of micro-scale titanium boride and nano-scale lanthanum oxide, the matrix is made of near alpha-type Ti-Al-Zr-Sn-Mo-Nb-W-Si alloy, the mass portion of each element in the matrix is 6-8 mass parts of Al, 7-9 mass parts of Zr, 5-7 mass parts of Sn, 1-1.5 mass parts of Mo, 1-1.5 mass parts of Nb, 1-1.5 mass parts of W, 0.3-0.5 mass parts of Si, 0.08-0.15 mass parts of O, less than or equal to 0.03 mass parts of C, less than or equal to 0.03 mass parts of N, less than or equal to 0.01 mass parts of H, and the balance is Ti and various impurity elements, the multi-scale ceramic phase is produced by reacting lanthanum hexaboride powder with the matrix, and the addition amount of the lanthanum hexaboride powder is 0.5-3.0% by mass of the titanium-based composite material.
  2. 2. The multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material according to claim 1, wherein 0.03 parts by mass or less of each of the impurity elements is obtained, and the total of the impurity elements is 0.15 parts by mass or less.
  3. 3. The multi-scale ceramic phase reinforced 750 ℃ resistant titanium matrix composite of claim 1, wherein the total volume fraction of the micro-sized titanium boride and nano-sized lanthanum oxide increases by about 2.3% for each 0.5% increase in lanthanum hexaboride powder.
  4. 4. A method for preparing a multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material according to any one of claims 1-3, comprising the following steps: Firstly, proportioning according to the mass percentage of each element in a matrix, and adding 0.5% of Al and Si excessively to compensate smelting burning loss; Step two, pressing the composite raw materials into raw material blocks through an oil press; and thirdly, firstly placing the raw material blocks into a vacuum induction suspension smelting furnace for smelting for a plurality of times, applying ultrasonic outward lifting, and then cooling along with the furnace to obtain a composite material cast ingot.
  5. 5. The method for preparing the multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material according to claim 4, wherein the matrix is prepared from titanium sponge, pure aluminum beans, zirconium sponge, ti-80Sn alloy, al-60Mo alloy, al-75Nb alloy, al-50W alloy and Al-10Si alloy.
  6. 6. The method for preparing the multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material according to claim 4, wherein the purity of the lanthanum hexaboride powder is 99.9%, and the average particle size is 38-42 μm.
  7. 7. The preparation method of the multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material is characterized by comprising the steps of carrying out smelting twice, wherein the smelting times comprise primary smelting and secondary smelting, the primary smelting induction power is 300 kW-350 kW, the time is 30-50 min, the ultrasonic power is 1500W-2000W, the frequency is 20 kHz-30 kHz, the action time is 10-20 min in the latter half of smelting, the primary ingot is obtained after the smelting is finished, and then carrying out secondary smelting by turning over the primary ingot, the induction power is 300 kW-350 kW, the time is 30-50 min, the ultrasonic power is 1500W-2000W, the frequency is 20 kHz-30 kHz, and the action time is 10-20 min in the latter half of smelting.
  8. 8. The titanium-based composite material prepared based on the multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material according to any one of claims 1-3 or the preparation method of the multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material according to any one of claims 4-7 is characterized by being applied to preparation of supersonic aircrafts and aerospace vehicles.

Description

Multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material and preparation method thereof Technical Field The invention belongs to the technical field of metal matrix composite materials, and relates to a multi-scale ceramic phase reinforced 750 ℃ resistant titanium matrix composite material and a preparation method thereof. Background The titanium-based composite material has wide application prospect in the fields of aerospace, energy power and the like due to high specific strength and good corrosion resistance, but the long-term service temperature of the traditional titanium-based composite material is usually not more than 650 ℃, and the problems of grain growth and remarkable reduction of tensile strength are easy to occur at high temperature. With the construction and promotion of aerospace integrated equipment in the aerospace field, the requirements of equipment such as supersonic aircrafts, aerospace aircrafts and the like on the material temperature resistance are continuously improved, and part of core components need to stably work in a complex stress environment with the temperature of more than 750 ℃. In the prior art, though the high-temperature strength can be improved by adding a single ceramic phase (such as TiB, siC and the like), the defects of agglomeration of the ceramic phase, poor interface bonding and the like exist, and meanwhile, the element proportion design of the matrix alloy is difficult to consider the temperature resistance and the processing performance, so that the composite material cannot meet the use requirement in the environment with the temperature of more than 750 ℃. In addition, the problems of alloy element burning loss, ceramic phase uneven distribution and the like in the preparation process further limit the high-temperature application range of the titanium-based composite material. Therefore, there is a need to develop a titanium-based composite material which is resistant to high temperatures of 750 ℃, stable in mechanical properties and reliable in preparation process. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material, and a preparation method and application thereof. In a first aspect, the invention provides a multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material, which is formed by compounding a matrix and multi-scale ceramic, wherein the multi-scale ceramic phase is micro-scale titanium boride and nano-scale lanthanum oxide, the matrix is near alpha-type Ti-Al-Zr-Sn-Mo-Nb-W-Si alloy, the mass part of each element in the matrix is Al：6%~8%,Zr：7%~9%,Sn：5%~7%,Mo：1%~1.5%,Nb：1%~1.5%,W：1%~1.5%,Si：0.3%~0.5%,O：0.08%~0.15%,C≤0.03%,N≤0.03%,H≤0.01%, and the balance of Ti and various impurity elements, the multi-scale ceramic phase is formed by reacting lanthanum hexaboride powder with the matrix, and the addition amount of the lanthanum hexaboride powder is 0.5% -3.0% of the mass of the titanium-based composite material. Further, each of the impurity elements is not more than 0.03%, and the sum of the impurity elements is not more than 0.15%. Further, the total volume fraction of the micro-sized titanium boride and the nano-sized lanthanum oxide increases by about 2.3% for every 0.5% increase in the lanthanum hexaboride powder. In a second aspect, the invention also provides a method for preparing the multi-scale ceramic phase reinforced 750 ℃ resistant titanium-based composite material, which comprises the following steps: Firstly, proportioning according to the mass percentage of each element in a matrix, and adding 0.5% of Al and Si excessively to compensate smelting burning loss; Step two, pressing the composite raw materials into raw material blocks through an oil press; and thirdly, firstly placing the raw material blocks into a vacuum induction suspension smelting furnace for smelting for a plurality of times, applying ultrasonic outward lifting, and then cooling along with the furnace to obtain a composite material cast ingot. Further, the matrix is prepared from titanium sponge, pure aluminum beans, zirconium sponge, ti-80Sn alloy, al-60Mo alloy, al-75Nb alloy, al-50W alloy and Al-10Si alloy serving as raw materials. Further, the purity of the lanthanum hexaboride powder is 99.9%, and the average particle size is 38-42 μm. In the third step, smelting is carried out twice, the power of an induction power supply for primary smelting is 300 kW-350 kW, the time is 30-50 min, the ultrasonic power is 1500W-2000W, the frequency is 20 kHz-30 kHz, the action time is 10-20 min in the second half of smelting, a primary cast ingot is obtained after smelting, the primary cast ingot is turned upside down to carry out secondary smelting, the power of the induction power supply is 300 kW-350 kW, the time is 30-50 min, the ultrasonic power is 1500W-2000W, the frequency is 20 kH