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以ZK61合金粉末为原料,通过放电等离子烧结的方法制备了ZK61生物镁合金块体,研究了不同烧结温度对合金块体微观组织和力学性能的影响。结果表明:制备出的ZK61合金块体内部结构致密,组织分布均匀,晶粒细小,块体致密度随烧结温度逐渐提高,在520℃时达到99.24%;随着烧结温度的升高,粉末颗粒间原子扩散作用增强,ZK61合金块体的力学性能也逐渐提高,在烧结温度为520℃时综合性能最好,其中显微硬度由370℃时的69.2 HV增加到79.3 HV,抗压强度和抗弯强度也获得最大值,分别为304 MPa和94.7 MPa,压缩率逐渐变大,韧性提高。
The ZK61 biomagnesium alloy block was prepared by spark plasma sintering with ZK61 alloy as raw material. The effects of sintering temperature on the microstructure and mechanical properties of the alloy block were studied. The results show that the internal structure of ZK61 alloy is compact, with uniform microstructure and fine grains. The bulk density increases with the sintering temperature and reaches 99.24% at 520 ℃. With the increase of sintering temperature, The mechanical properties of the block of ZK61 alloy are also gradually improved. When the sintering temperature is 520 ℃, the comprehensive properties are the best. The microhardness increases from 69.2 HV at 370 ℃ to 79.3 HV. The compressive strength and resistance The flexural strength also obtained the maximum values of 304 MPa and 94.7 MPa, respectively. The compressibility gradually increased and the toughness improved.