OALib Journal期刊
ISSN: 2333-9721
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fe2(moo4)3/si3n4复合粉末还原过程中的微观组织结构
Keywords: 无机非金属材料,si3n4,fe2(moo4)3,微结构,非均相沉淀--热还原
Abstract:
?观测fe2(moo4)3和fe2(moo4)3/si3n4粉末h2还原后的微结构特征,研究了其微观组织结构的演变。结果表明:fe2(moo4)3还原后转变为20nm厚的fe薄层包覆mo颗粒的微结构;fe2(moo4)3/si3n4粉末被还原后转变为两种结构形式颗粒粉末,一种为3--5nm的薄层fe包覆在mo颗粒表面粉末,一种为粘附有纳米fe--mo氮化物、si、mo等颗粒的si3n4粉末。fe2(moo4)3/si3n4粉末还原后形成这种微结构的原因是,在还原过程中同时发生了两种反应:一种是fe2(moo4)3自身发生分解还原反应,另一种是fe2(moo4)3与si3n4颗粒表面发生反应。
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