【摘要】 以制备Fe基金刚石金属结合剂为目的,通过TG、TPR、XRD、Mssbauer谱研究了不同存在状态下草酸亚铁的分解还原,发现氢气气氛中单组分草酸亚铁先分解为Fe3O4,然后再还原为α-Fe;机械混合样品中草酸亚铁的分解还原不受草酸铜和草酸镍的影响,与单组分草酸亚铁相近;共沉淀中草酸亚铁和草酸铜、草酸镍发生相互作用,先分解为复合金属氧化物,然后再还原成为合金状态。更多还原

【Abstract】 In preparation of diamond metal matrix,ferrous oxalate thermal decomposition and reduction were investigated by TG,TPR,XRD and Mssbauer spectroscopy under different conditions.The results indicated that under H2 flow,ferrous oxalate was decomposed to Fe3O4 initially before the generated Fe3O4 was reduced to α-Fe.In addition,the decomposition and reduction of manually mixed sample of ferrous oxalate were free from the influence of mixture components such as cupric oxalate and nickel oxalate;it was rather similar to pure ferrous oxalate.However,thermal decomposition and reduction of ferrous oxalate in co-precipitation depended on cupric oxalate and nickel oxalate,as the sample was decomposed to composite metal-oxide at first,then the composite metal-oxide was reduced to alloy powder.更多还原