超细晶硬质合金显微组织与断裂路径的体视学表征研究  

Stereological characterizations of microstructure and fracture path in ultrafine hard alloys

作　　者：宋晓艳[1] 赵世贤[1] 刘雪梅[1] 魏崇斌[1] 王海滨[1] 高杨[1] 刘国权[2] 

机构地区：[1]北京工业大学材料科学与工程学院/新型功能材料教育部重点实验室,北京100124 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《中国体视学与图像分析》2011年第2期131-136,共6页Chinese Journal of Stereology and Image Analysis

基　　金：北京新材料产业关键技术攻关项目(Z08000003220000);"973"计划前期专项课题(2011CB612207)

摘　　要：本文介绍了应用于硬质合金材料显微组织定量化表征的体视学参量的定义和测定方法。对制备出的不同特点的超细晶系列WC-10wt.%Co硬质合金试样,全面测定了其显微组织体视学参量,并获得了显微组织表征参量WC晶粒尺寸dWC、Co相平均自由程LCo和WC晶粒邻接度CWC-WC之间的确定对应关系。对系列硬质合金试样的断口路径显微组织进行了体视学表征和分析,据此提出了由显微组织参数判断合金断裂行为的基本依据。研究结果表明,有关体视学概念和参量的应用是定量表征亚微米超细晶硬质合金材料复相显微组织特征的最佳途径。The concepts and measurement methods of stereological parameters for characterizing microstructure and fracture path of WC-10wt.%Co hard alloys were presented.For the prepared series of hard alloys,systematic stereological characterization was performed,and the relationships among WC grain size dWC,Co free path LCo and grain connectivity were proposed.The fracture surfaces of a series of hard alloys were also characterized by stereological parameters,from which the criteria for the fracture behavior of hard alloys were proposed.The results of this study show that stereological characterization is at present the best approach to quantitatively analyze the microstructure of ultrafine（submicro scale） hard alloys.

关 键 词：硬质合金 显微组织 晶粒尺寸 平均自由程 邻接度 

分 类 号：TF125.3[冶金工程—粉末冶金] TG135.5[冶金工程—冶金物理化学]