非晶/晶态MgZnCa复合材料在模拟体液中的腐蚀行为

Corrosion Behavior of Amorphous/Crystalline MgZnCa Composite in Simulated Body Fluids

利用熔体旋淬和铜模喷铸法分别制备了Mg_(60+x)Zn_(35-x)Ca_5(x=0, 3, 6, 9)非晶态合金薄带、非晶态合金棒材、非晶/晶态合金棒材;分析了它们的物相组成、晶态的晶粒尺寸和分布情况,以及不同成分的Mg_(60+x)Zn_(35-x)Ca_5(x=0, 3, 6, 9)合金的玻璃形成能力(GFA);研究了完全非晶态的Mg_(60+x)Zn_(35-x)Ca_5(x=6, 9)棒材和非晶/晶态复合的Mg_(60+x)Zn_(35-x)Ca_5(x=0,3)棒材在模拟体液(SBF)中的腐蚀行为。结果表明,MgZnCa合金都具有玻璃形成能力;完全非晶态的MgZnCa合金的GFA和在模拟体液中的耐蚀性均比非晶/晶态复合的MgZnCa合金好;通过调控MgZnCa合金的成分,可以控制MgZnCa合金的降解速率。

Mg60＋xZn35-xCa5（x=0,3,6,9） amorphous ribbons,amorphous alloy rods,amorphous/crystalline alloy rods were prepared by melt-spinning and copper mold injection-casting.The glass forming ability（GFA） of Mg60＋xZn35-xCa5（x=0,3,6,9） alloy with different components,grain size and distribution of crystalline state and different components were analyzed.The corrosion behavior of completely amorphous Mg60＋xZn35-xCa5（x=6,9） rods and amorphous/crystalline composite Mg60＋xZn35-xCa5（x=0,3） rods in simulated body fluid（SBF） was investigated.The results show that all Mg ZnCa alloys has glass forming ability,and the GFA of completely amorphous Mg ZnCa alloy and the corrosion resistance in simulated body fluid are better than that of amorphous/crystalline composite Mg ZnCa alloy.The degradation rate of Mg ZnCa alloy can be controlled by controlling the composition of Mg ZnCa alloy.