US 12,421,572 B1
Spherical medical tantalum alloy powder, preparation method therefor and use thereof
Xingchen Yan, Guangzhou (CN); Dongdong Dong, Guangzhou (CN); Jiangqi Zhu, Guangzhou (CN); Bingwen Lu, Guangzhou (CN); and Cheng Chang, Guangzhou (CN)
Assigned to Institute of New Materials, Guangdong Academy of Sciences, Guangzhou (CN)
Filed by Institute of New Materials, Guangdong Academy of Sciences, Guangzhou (CN)
Filed on Jan. 3, 2025, as Appl. No. 19/008,716.
Claims priority of application No. 202411227044.8 (CN), filed on Sep. 3, 2024.
Int. Cl. C22C 1/04 (2023.01); B22F 1/065 (2022.01); B33Y 70/00 (2020.01); C22C 27/02 (2006.01)
CPC C22C 1/045 (2013.01) [B22F 1/065 (2022.01); C22C 27/02 (2013.01); B22F 2301/20 (2013.01); B22F 2304/10 (2013.01); B33Y 70/00 (2014.12)] 5 Claims
OG exemplary drawing
 
1. A method for preparing a spherical medical tantalum alloy powder, comprising the following steps:
S1. conducting preliminary plasma spheroidization on a pure tantalum powder to obtain a spherical pure tantalum powder;
S2. mixing the spherical pure tantalum powder obtained from S1 with a pure copper particle and a pure silver particle, and then subjecting the mixture to a planetary ball milling to obtain a mixed metal powder; and
S3. conducting plasma spheroidization on the mixed metal powder obtained in S2 such that a surface of the pure tantalum powder is coated with copper and silver, and then sieving and filtering to obtain the spherical medical tantalum alloy powder;
wherein process parameters for the preliminary plasma spheroidization in S1 and the plasma spheroidization in S3 are independently: a powder feed rate of 10-20 g·min−1, a carrier gas flow rate of a protective gas of 5-15 L/min, a central gas flow rate of 15-25 L/min, a sheath gas flow rate of 50-80 L/min, a grid current of 0.2-0.6 A, a plate voltage of 5-15 kV, and a plate current of 2-6 A,
wherein the spherical medical tantalum alloy powder comprises: in weight percentage, 89-98.9% of Ta, 0.1-1% of Ag, and 1-10% of Cu.