CN-122028993-A - Titanium hydride powder and active metal brazing filler metal

Abstract

The titanium hydride powder of the present invention contains TiH 2 and is used for an active metal filler metal, and when analyzed by an image analysis method, the average particle diameter D50 is in the range of 0.1 μm to 10.0 μm, and the number ratio of particles having a particle diameter of 15 μm or more is 15% or less.

Inventors

• SASAGAWA MASASHI
• Takenaka Shigeruku

Assignees

• 东邦技术服务股份有限公司

Dates

Publication Date

20260512

Application Date

20241017

Priority Date

20231102

Claims (8)

1. 1. A titanium hydride powder containing TiH 2 for use in an active metal filler metal, When analyzed by an image analysis method, the average particle diameter D50 is in the range of 0.1 μm to 10.0 μm, and the number ratio of particles having a particle diameter of 15 μm or more is 15% or less.
2. 2. The titanium hydride powder according to claim 1, wherein, When analyzed by an image analysis method, the number ratio of particles having a particle diameter of 15 μm or more is 10% or less.
3. 3. The titanium hydride powder according to claim 1, wherein, The maximum particle diameter measured by an image analysis method is 50 μm or less.
4. 4. The titanium hydride powder according to claim 3, wherein, The maximum particle diameter measured by an image analysis method is 35 μm or less.
5. 5. The titanium hydride powder according to claim 1, wherein, When analyzed by an image analysis method, the larger of the difference between the average particle diameter D50 and the 10% particle diameter D10 and the difference between the 90% particle diameter D90 and the average particle diameter D50 has a value of 10 μm or less.
6. 6. The titanium hydride powder of claim 5, wherein, When analyzed by an image analysis method, the larger of the difference between the average particle diameter D50 and the 10% particle diameter D10 and the difference between the 90% particle diameter D90 and the average particle diameter D50 is 8 μm or less.
7. 7. The titanium hydride powder according to claim 1, wherein, The active metal brazing filler metal is used for bonding a ceramic material and a metal material.
8. 8. An active metal filler metal comprising the titanium hydride powder according to any one of claims 1 to 7.

Description

Titanium hydride powder and active metal brazing filler metal Technical Field The invention relates to titanium hydride powder containing TiH 2 and active metal brazing filler metal. Background For example, small pieces produced during crushing of a titanium sponge block obtained by reducing titanium tetrachloride with magnesium metal, and cutting pieces and other scraps (scrap) produced during cutting of an ingot (ingot) or slab (slab) obtained by melting and casting the crushed titanium sponge may be subjected to a hydrogenation dehydrogenation process (so-called HDH process). In the hydrodeoxygenation method, the above-mentioned small pieces, scraps, and the like are heated in a hydrogen atmosphere to be subjected to hydrotreatment to embrittle them, and then crushed into a predetermined particle size to prepare titanium hydride powder. Thereafter, the titanium hydride powder is heated in vacuum as a dehydrogenation treatment to become titanium powder (pure titanium powder). The titanium hydride powder obtained before the dehydrogenation treatment in the hydrodeoxygenation method contains TiH 2 as a metal hydride, and can be used for various applications in addition to the production of titanium powder by the hydrodeoxygenation method described above. As a technique related thereto, patent document 1 describes "a method for producing Ti powder, characterized in that in the method for producing titanium powder by hydrogenation and dehydrogenation, titanium hydride is pulverized to have an average particle diameter of 10 μm or less and the dehydrogenation temperature is set to 300 to 600 ℃. Patent document 2 describes "a titanium-based powder obtained by a hydrodeoxygenation method, which has a particle size in the range of 5 to 74 μm and an average particle size of 20 μm or less, and has a flow characteristic of less than 100sec/50 g. The patent document 2 describes that "the particle size adjustment step of the present invention is an operation stage of mechanically pulverizing and classifying the pulverized titanium hydride powder or titanium hydride alloy powder after the hydrogenation step to adjust the particle size to a particle size in the range of 5 to 74 μm and an average particle size of 20 μm or less. ". It is considered that the "titanium hydride" described in patent document 1 and the "titanium hydride powder" described in patent document 2 are used for producing titanium powder by the hydrodeoxygenation method. Patent document 3 describes that "the titanium-based powder for paste of the present invention has an average particle diameter of 20 μm or less and a d90 of 22.50 μm or less, and that parameters α and β concerning the particle size distribution satisfy the following relational expression. 0.6< beta/alpha <1.0 (1). Here, α= (d 90-d 50)/d 50, β= (d 50-d 10)/d 50, and d10, d50, d90 refer to particle diameters of the titanium-based powder corresponding to 10%, 50%, and 90% of the cumulative weight relative to the cumulative frequency distribution. The titanium-based powder for paste of the present invention is preferably titanium hydride powder produced by a hydrogenation pulverization method or titanium metal powder produced from the same as a raw material. ". Patent document 3 describes that "the present invention exhibits an effect of being preferably used as a paste for producing a titanium sheet suitable for an electrode of a dye-sensitized solar cell or a secondary battery". ". Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 3-122205 Patent document 2 Japanese patent laid-open No. 7-278601 Patent document 3 Japanese patent No. 5898761 Disclosure of Invention Problems to be solved by the invention The active metal filler metal used for joining, for example, joining a ceramic material and a metal material, which are difficult to join by a normal filler metal, may contain Ti, and titanium hydride powder may be used for the active metal filler metal. In this case, titanium hydride powder is required to be capable of improving the reactivity of Ti in the active metal filler metal with the joining target such as ceramic material and the wettability of the active metal filler metal with the joining target (english: wettability). Patent documents 1 to 3 have no attention to the above-mentioned use and side surfaces of titanium hydride powder. The purpose of the present invention is to provide titanium hydride powder which can be suitably used for an active metal filler metal, and an active metal filler metal. Solution for solving the problem As a result of intensive studies, the inventors have found that, when titanium hydride powder having a predetermined particle diameter or particle size distribution is used for an active metal filler metal, compounds at the joint interface between Ti in the active metal filler metal and a workpiece are formed substantially uniformly. The inventors considered that the above-described effects can be achieved by adju