MEDICAL DEGRADABLE ZNMGCA MEDIUM-ENTROPY ALLOY, AND PREPARATION METHOD THEREFOR AND USE THEREOF

WIPO Patent Application WO/2023/232158

A1

A medical degradable ZnMgCa medium-entropy alloy, and a preparation method therefor and the use thereof. The alloy comprises the following components in atomic percentages: 65 at.% ≤ Zn ≤ 85 at.%, 15 at.% ≤ Mg ≤ 35 at.%, and 4 at.% ≤ Ca ≤5 at.%. The preparation method for the alloy comprises: subjecting three metal element powders, namely zinc, magnesium and calcium, to mechanical alloying in a ball mill; then subjecting the obtained alloyed medium-entropy alloy powder to pre-pressing forming; then subjecting same to vacuum hot pressed sintering; subjecting a sintered block to an annealing treatment; and finally, removing external impurities left on the surface of a sample and burrs on the edge of the sample, so as to obtain a ZnMgCa medium-entropy alloy. The prepared medium-entropy alloy material has a high density and good strength and toughness. The strength and thermal stability of the material can be improved by further performing an annealing treatment in addition to combining mechanical alloying with a vacuum hot-press sintering method, such that the application range of a medical degradable zinc-based alloy is expanded.

GUO PUSHAN (CN)
ZHANG JINGDAN (CN)
LIU YAXUAN (CN)
ZHANG YI (CN)
GUO CHANG (CN)

PCT/CN2023/105637

December 07, 2023

July 04, 2023

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UNIV CHANGZHOU (CN)

C22C18/00; B22F3/105; B22F3/14; B22F9/04; C22C1/04

WO2016152909A1

2016-09-29

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CN114635069A	2022-06-17

CHANGZHOU INNOVATION PATENT AGENCY (CN)

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