Institute of New Materials, Guangdong Academy of Sciences

Xingchen Yan

Cheng Chang

Min Liu

Changguang Deng

Dongdong Dong

Qingkun Chu

Bingwen Lu

Jiangqi Zhu

The present disclosure provides a spherical medical tantalum alloy powder, a preparation method therefor and a use thereof, the preparation method 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, and then sieving and filtering to obtain the spherical medical tantalum alloy powder. In the present disclosure, through the preparation method combining two-stage plasma spheroidization technology with planetary ball milling technology, the burnout of copper and silver can be reduced, and the spheroidization rate of the tantalum alloy powder can be further improved.

Spherical medical tantalum alloy powder, preparation method therefor and use thereof

Disclosed are a high-entropy alloy (HEA) coating and a preparation method and use thereof. Laser cladding is conducted with an HEA powder to obtain the HEA coating, where the HEA is a FeCoCrNiAlTialloy, and the HEA includes the following chemical components in atomic percentage: Al: 10.01% to 12.30%, Co: 18.1% to 22.5%, Cr: 18.05% to 20.12%, Fe: 18.77% to 21.02%, Ni: 19.21% to 20.99%, and Ti: 8.43% to 11.5%. The HEA material with high hardness and wear resistance provided by the present disclosure is suitable for laser cladding of a surface of a precision mold, an offshore component, or a drilling rod. A powder is prepared from the above alloy components and then prepared into a corresponding HEA coating with high strength, high hardness, and prominent wear resistance through laser cladding. The material has prominent weldability and is a special nickel-based HEA material suitable for laser additive manufacturing.

High-entropy alloy coating and preparation method and use thereof

Disclosed is a biomedical β titanium alloy and a preparation method thereof. Its composition includes: Mo: 9.20-13.50%; Fe: 1.00-3.20%; Zr: 3.50-8.20%; Ta: 0-1.00%; the balance is Ti. The β titanium alloy is suitable for the laser additive manufacturing technology, and the prepared parts have a dense equiaxed grain structure with ultra-low grain size and a small number of columnar grain structures, which produces a fine-grain strengthening effect, and greatly improve the hardness and tribocorrosion performance of the alloy material. Also provided is a method for preparing a non-toxic, low-elasticity, and tribocorrosion resistant biomedical β titanium alloy material. A powder prepared from the above alloy components is subjected to a laser additive manufacturing technology to prepare a corresponding β titanium alloy with high-hardness, good tribocorrosion resistance and extremely low cytotoxicity. Moreover, the prepared material has good weldability and is a special metal alloy powder suitable for laser additive manufacturing.

Biomedical beta titanium alloy and preparation method thereof

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Guangdong, China

Xingchen Yan