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对Mo-Si-B三元系中各化合物不同温度下的标准生成自由焓和不同开始温度下合成Mo-Si-B三元系多相合金反应的绝热温度以及生成物的熔化比进行了计算和分析评估。结果表明,在元素配比合适的情况下,原位合成热力学稳定的α-Mo+Mo3Si+Mo5SiB2(T2)和Mo3Si+Mo5Si3(T1)+T2多相合金是完全可行的,合成反应的绝热温度以及生成物的熔化比与开始温度有关,原位合成这些多相合金不宜采用燃烧合成的SHS(自蔓延高温合成)模式,适合采用燃烧合成的热爆模式。
The standard enthalpy of formation at different temperatures of Mo-Si-B ternary system and the adiabatic temperature of the Mo-Si-B ternary heterogeneous alloy at different initial temperatures and the melting ratio of the products were calculated And analysis and evaluation. The results show that in-situ synthesis of thermodynamically stable multiphase α-Mo + Mo3Si + Mo5SiB2 (T2) and Mo3Si + Mo5Si3 (T1) + T2 multiphase alloys is feasible. The adiabatic temperature And the melting ratio of the product is related to the starting temperature. In situ synthesis of these multi-phase alloys is not suitable for SHS (Combustion Synthesis) mode of combustion synthesis, and is suitable for the thermal explosion mode of combustion synthesis.