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在高温转变陶瓷工艺过程中,通过不同金属元素(Ni、Mn、Co和Fe)的添加,原位反应合成出Si-C- N陶瓷基体的复合材料。由于金属元素的存在,使得所合成的复合材料的质量损失减小,密度增加。富金属相能均匀分布在基体材料中,复合材料无明显缺陷。XRD分析结果表明,Ni、Mn和Fe在高温分解过程中与基体都发生反应,分别生成了Ni_(31)Si_(12)、Mn_5Si_3和Mn_2N_(0．86)、Fe_3Si,而Co没有。由于这些不同富金属相的存在,使得复合材料的磁学性能在低温(77K)和室温(300K)有所不同。
In the process of high temperature transformation of ceramics, the composite materials of Si-C-N ceramic matrix were synthesized by in-situ reaction by adding different metal elements (Ni, Mn, Co and Fe) Due to the presence of metal elements, the mass loss of the synthesized composite decreases and the density increases. Metalliferous phase evenly distributed in the matrix material, the composite material without obvious defects. The results of XRD analysis showed that Ni, Mn and Fe reacted with the matrix during the pyrolysis, respectively, Ni 31 Si 12, Mn 5 Si 3, Mn 2 N 0.86 and Fe 3 Si, respectively, but not Co 3. Due to the existence of these different metal rich phases, the magnetic properties of the composites are different at low temperature (77K) and room temperature (300K).