Mo-Si-B三元系中T2相合金的制备工艺研究

发布时间：2018-03-16 23:25

  本文选题：MoSi　切入点：B(T)　出处：《金属学报》2015年11期 　论文类型：期刊论文

【摘要】：分别通过还原气氛常压烧结法(TFS)和放电等离子烧结法(SPS)制备Mo5Si B2(T2)相合金,并采用XRD,SEM和TEM等方法对合金的微观结构进行表征.结果表明:快的升温速率是合成T2相的动力学条件,相比传统烧结方式,SPS法以独特的等离子活化烧结方式提供快的加热速率,能够在较短的时间内升温到所需温度1500℃,避免Mo,Si和B混合粉末在中温区间(600~1200℃)通过固-固反应生成Mo3Si,Mo5Si3和Mo B等二元相,而通过固-液反应原位合成T2相.合金平均晶粒尺寸为1.44 mm,晶界清晰、洁净、无过渡区且在晶体内没有观察到位错等缺陷.
[Abstract]:Mo5Si B _ 2T _ 2) phase alloys were prepared by reduction atmosphere sintering under atmospheric pressure and spark plasma sintering (SPS), respectively. The microstructure of the alloys was characterized by XRD-SEM and TEM. The results show that the rapid heating rate is the kinetic condition for the synthesis of T _ 2 phase. Compared with the traditional sintering method, SPS provides a rapid heating rate with a unique plasma activated sintering method, and can be heated to 1500 鈩，

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