CAJ | 학술논문

采用非均相沉淀法制得Cu包裹SiC_p复合粉体,利用干混、球磨的方法获得混合均匀的Fe-SiC_p(Cu)粉体.分别采用常压气氛烧结和电导直热真空热压烧结两种方式制备出SiCp/Fe金属陶瓷.利用XRD、SEM等手段对包裹粉体和烧结样品的组成及形貌等进行了表征,分别采用阿基米德原理及显微硬度仪测量了烧结样品的密度和显微硬度.结果表明,SiC_p表面包裹一层Cu有利于改善SiC_p和Fe的分散性和化学相容性.热压条件下样品的结构均匀,致密度和显微硬度均高于常压下制品.热压950 ℃保压4 min的样品密度和维氏硬度分别为7.12 g/cm~3和4200 MPa.
채용비균상침정법제득Cu포과SiC_p복합분체,이용간혼、구마적방법획득혼합균균적Fe-SiC_p(Cu)분체.분별채용상압기분소결화전도직열진공열압소결량충방식제비출SiCp/Fe금속도자.이용XRD、SEM등수단대포과분체화소결양품적조성급형모등진행료표정,분별채용아기미덕원리급현미경도의측량료소결양품적밀도화현미경도.결과표명,SiC_p표면포과일층Cu유리우개선SiC_p화Fe적분산성화화학상용성.열압조건하양품적결구균균,치밀도화현미경도균고우상압하제품.열압950 ℃보압4 min적양품밀도화유씨경도분별위7.12 g/cm~3화4200 MPa.
Cu-coated SiC powders were prepared by a heterogeneous deposition method. A current-vacuum hot-pressing sintering and a conventional sintering were used to prepare SiC_p-reinforced Fe cermets. The microstructures of the Cu-coated SiC powers and the sintered compacts were characterized by SEM and XRD. The density and microhardness of the sintered compacts were measured. It is found that the Cu-coated SiC_p is favorable to improve the dispersibility and chemical compatibility of SiC_p-reinforced Fe cermets and the current-vacuum hot-pressing sintering is a more effective method. The density and microhardness of the compacts by hot-pressing sintering at 950 ℃ for 4 min are 7.12 g/cm~3 and 4200 MPa, respectively.