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对ＭＢ１５合金和（Ｂ４Ｃｐ＋ＳｉＣｗ）／ＭＢ１５复合材料在１７０℃的时效特性进行了比较研究。ＤＳＣ结果表明，复合材料中时效相的析出过程比基体合金提前，且析出量增加，而析出相的溶解过程推迟。ＴＥＭ观察发现，复合材料中析出物仍为ＬａｖｅｓＭｇＺｎ２′相，且在ＳｉＣｗ／Ｍｇ与Ｂ４Ｃｐ／Ｍｇ两种界面上和界面反应物ＭｇＢ２上优先析出。维氏硬度测试表明，复合材料有明显的时效加速，达到峰时效只需６ｈ，而基体合金需４０ｈ，但复合材料与基体合金的时效强化效果相近。
The aging characteristics of MB15 alloy and (B4Cp + SiCw) / MB15 composites at 170 ℃ were compared. The DSC results show that the precipitation process of the aging phase in the composite material advances earlier than that of the matrix alloy, and the amount of precipitation increases, while the dissolution phase of the precipitated phase is delayed. TEM observation showed that the precipitates in the composite were still LavesMgZn2’phase and preferentially precipitated on the interface of SiCw / Mg and B4Cp / Mg and the interface reactant MgB2. The Vickers hardness test shows that the composites have obvious aging accelerated, and the peak aging time is only 6h, while the matrix alloy needs 40h, but the aging strengthening effect of the composite and the matrix alloy are similar.