以AZ91D合金粉末和H3BO3为原料,采用X射线衍射(XRD)、扫描电镜(SEM)及X射线能谱分析(EDS)研究了原料配比和烧结温度对原位固相合成MgO晶须的形貌及其物相变化的影响.结果表明,当Mg/B物质的量比为15∶4时,在惰性气氛条件下采用烧结温度800℃和保温时间2h的工艺可以制备出长度和直径分别为1～3μm和0.1～0.3 μm的MgO晶须;探讨了MgO晶须的生长机理,认为MgO晶须的生长符合溶液(Solution)-液(Liquid)-固(Solid) (SLS)机制.
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