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本文作者在基体合金中加入适量富镧混合稀土和适当提高锰量及铁量，使该复合材料在３００℃时的瞬时强度提高到１６５ＭＰａ，３５０℃时的瞬时强度提高到１１４ＭＰａ，４００℃时的瞬时强度提高到７７ＭＰａ。作者通过对莫来石短纤维增强ＺＬ１０９ 复合材料的高温强度特性及高温下的断裂机理的分析，认为适量加入富镧混合稀土，可以改善基体合金液同纤维之间的润湿状况，生成以纤维为基底长大的金属间化合物，从而改善纤维和基体之间的结合状况
The author adds a proper amount of lanthanum-rich mischmetal to the matrix alloy and appropriately increases the amount of manganese and iron so that the instantaneous strength of the composite increases to 165 MPa at 300 ° C. and the instantaneous strength at 350 ° C. increases to 114 MPa. At 400 ° C. Instantaneous strength increased to 77MPa. Based on the analysis of the high temperature strength properties of mullite short fiber reinforced ZL109 composites and the fracture mechanism at high temperature, the author thinks that the addition of lanthanum-rich mischmetal can improve the wettability between the matrix alloy liquid and the fibers, For the substrate to grow intermetallic compounds, thereby improving the bond between the fiber and the matrix