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OALib Journal期刊
ISSN: 2333-9721
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添加co对碳化钨颗粒增强表层复合材料性能的影响
Keywords: 复合材料,表层复合材料,v--epc,粒状珠光体,co3w3c,界面反应
Abstract:
？制备wc--co表层增强复合材料,观测复合层的显微组织和基体中的生成相,研究了添加co对碳化钨颗粒增强表层复合材料性能的影响。结果表明:co的加入使复合层中的基体组织中产生了细小粒状珠光体和屈氏体,降低了材料的脆性倾向,提高材料整体性能。金属液浸入预制层后,沿基材至复合层表面方向,金属液的温度递减,热扩散作用小,增加复合层内部基体成分不均匀性。当基体中的w、c原子浓度升高,基体中析出η型co3w3c碳化物。在复合层冷却至1200℃之前,基体能够与碳化钨颗粒发生界面反应生成co3w3c碳化物,提高基体的硬度,从而提高复合材料的耐磨性。
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