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通过 ＦＥ－ＳＥＭ（ｆｉｅｌｄ ｅｍｉｓｓｉｏｎ－ｓｃａｎｎｉｎｇ ｅｌｅｃｔｒｏｎ ｍｉｃｒｏｓｃｏｐｙ），ＴＥＭ（ｔｒａｎｓｍｉｓｓｉｏｎ ｅｌｅｃｔｒｏｎ ｍｉｃｒｏｓｃｏｐｙ）和Ｘ射线衍射研究了高温氧化的ＳｉＣ颗粒增强含镁铝合金基复合材料的界面反应过程．发现该界面反应首先形成纳米ＭｇＯ，然后是否继续与铝液反应取决于Ｍｇ的含量以及纳米ＭｇＯ层致密程度．在Ｍｇ含量不足以形成致密的纳米ＭｇＯ层时，ＳｉＯ２与ＭｇＯ和铝液继续反应形成ＭｇＡｌ２Ｏ４晶体；当Ｍｇ的含量足以形成致密的纳米ＭｇＯ层，则其能良好地保护内层ＳｉＣ免受铝液的进一步侵蚀．表明ＭｇＯ和ＭｇＡｌ２Ｏ４均为高温热稳定界面反应产物．澄清了对于该界面反应过程的模糊认识和推测．这对于复合材料界面反应控制及界面设计具有重要价值．
The interfacial reaction of Mg-Al matrix composites reinforced by high temperature oxidized SiC particles was studied by field emission-scanning electron microscopy (TEM), transmission electron microscopy (TEM) and X-ray diffraction. It is found that the interface reaction firstly forms nano-MgO, and then whether to continue the reaction with the aluminum liquid depends on the content of Mg and the density of the nano-MgO layer. When the Mg content is not enough to form a dense nano-MgO layer, the SiO2 and the MgO and the aluminum liquid continue to react to form the MgAl2O4 crystal. When the content of Mg is sufficient to form a dense nano-MgO layer, it can well protect the inner SiC from the molten aluminum Further erosion. It is indicated that both MgO and MgAl2O4 are high temperature thermal stable interfacial reaction products. Clarified the fuzzy understanding and speculation of the interface reaction process. This is of great value to the composite interface reaction control and interface design.