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首页> 外文期刊>Journal of Materials Science >Elevated temperature mechanical properties of MoSi2/Si3N4, MoSi2/SiC composites produced by self-propagating high temperature synthesis
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Elevated temperature mechanical properties of MoSi2/Si3N4, MoSi2/SiC composites produced by self-propagating high temperature synthesis

机译：自蔓延高温合成制备的MoSi2 / Si3N4，MoSi2 / SiC复合材料的高温力学性能

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摘要

MoSi2/Si3N4 and MoSi2/SiC composite powders were produced via a novel self-propagating high temperature synthesis technique (SHS) and consolidated both by hot-pressing and plasma spraying. Mechanical testing subsequently was performed under four-point bending at a variety of elevated temperatures and strain rates. Damage accumulation in the hot-pressed materials, either by particle cracking or particle/matrix separation, resulted in composite mechanical properties that were reduced below the level of the unreinforced material. Plasma sprayed materials showed power-law hardening behaviour caused by Mo5Si3 precipitates and increased strain tolerance because of the fine grain size and reduced yield strength of the matrix. (C) 1998 Chapman & Hall. [References: 21]
机译：MoSi2 / Si3N4和MoSi2 / SiC复合粉末是通过一种新型的自蔓延高温合成技术（SHS）生产的，并通过热压和等离子喷涂进行固结。随后，在各种高温和高应变速率下，在四点弯曲下进行了机械测试。通过颗粒破裂或颗粒/基质分离，热压材料中的损伤积累会导致复合材料的机械性能降低到未增强材料的水平以下。等离子喷涂材料显示出由Mo5Si3沉淀引起的幂律硬化行为，并且由于基体的晶粒细小和屈服强度降低而提高了应变耐受性。 （C）1998查普曼和霍尔。 [参考：21]

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