摘要
利用机械合金化方法制备出纳米Al-12%Sn合金粉体,然后将其压制成型,并进行烧结得到块体合金;运用X射线衍射仪和扫描电镜分析了合金在高能球磨和烧结过程中的组织结构变化,并进行了耐磨性能试验。结果表明:随着烧结温度升高,合金中纳米锡相的尺寸长大,合金硬度下降;在523 K温度以下烧结时,锡相可均匀分布于铝基体上;当烧结温度超过523 K,高于了铝-锡合金的共晶温度,部分锡相呈网状分布,但仍有很多锡均匀弥散分布在基体上;在723 K烧结的合金具有优良的耐磨性能。
Al-12%Sn alloy powders were prepared by mechanical alloying.Then the bulk alloy could be obtained after sintering the compressed alloy powders.Microstructure changes of the alloy during high energy milling and sintering were investigated by using XRD and SEM.The wear-resisting property test was performed also.The results show that with the increase of sintering temperature,the grain size of the nano tin phase in the alloy increased and hardness of the alloy decreased.Sn distributed homogenously in the Al substrate when the sintering temperature was below 523 K.When the sintering temperature was above 523 K which was higher than the eutectic temperature of Al-Sn alloy,partial Sn net distributed and most Sn distributed dispersively and uniformly in the Al substrate.The alloy had excellent wear resistance after sintering at 723 K.
出处
《机械工程材料》
CAS
CSCD
北大核心
2010年第4期65-68,共4页
Materials For Mechanical Engineering
基金
广东省自然科学基金资助项目(05200618)
