XRD技术在纳米WC-Co复合粉制备过程中的应用  

Application of X-ray Diffraction Technique in Preparation of WC-Co Nanocomposite Powder

作　　者：郭圣达[1,2] 羊建高[1,2,3] 朱二涛[1] 陈颢[1,2] 周阳[2] 吕健[1] 

机构地区：[1]江西理工大学工程研究院,江西赣州341000 [2]钨资源高效开发及应用技术教育部工程研究中心,江西赣州341000 [3]湖南顶立科技有限公司,湖南长沙410111

出　　处：《稀有金属与硬质合金》2015年第2期25-28,53,共5页Rare Metals and Cemented Carbides

基　　金：国家国际合作专项(2011DFR50970);国家863计划项目(2012AA061902);国家自然科学基金资助项目(51161008;51174101;51404110);湖南省科技重大专项(2012FJ1009);江西理工大学科研基金(NSFJ2015-K18)

摘　　要：介绍了X射线衍射技术(XRD)的原理及其在钨粉末冶金中的运用,并结合笔者对纳米WC-Co复合粉的研究,重点介绍了XRD技术在纳米WC-Co复合粉制备过程中的应用,包括物相定性分析、晶粒尺寸测定及点阵参数测定等方面的应用。以可溶钴盐、偏钨酸铵(AMT)、有机碳源为主要原料,通过喷雾转化、连续低温还原碳化法制备出了纳米晶WC-Co复合粉,用XRD技术对制备过程中样品进行分析,结果表明:采用喷雾转化、连续低温还原碳化工艺可制备出仅有WC和Co两相的复合粉末,W被完全碳化,WC晶粒度约60nm,Co相为面心立方结构。The principle of X-ray diffraction(XRD)and its application in tungsten powder metallurgy are introduced.Combined with the authors' research on WC-Co nanocomposite powder,the application of XRD technique in preparation of WC-Co nanocomposite powder is emphatically introduced,including qualitative phase analysis,grain size determination and lattice parameter determination.Using soluble cobalt salt,ammonium metatungstate(AMT)and organic carbon source as main raw materials,WC-Co nanocomposite powder was prepared by spray conversion and continuous low-temperature reduction carbonization and the samples were analyzed by XRD during preparation.The results show that the composite powder only having the two phases of WC and Co can be prepared by spray conversion and continuous low-temperature reduction carbonization,W is completely carbonized,the grain size of WC is about 60 nm,and Co phase exists with face-centered cubic structure.

关 键 词：X射线衍射 纳米WC-Co复合粉末 物相定性分析 晶粒尺寸测定 点阵参数测定 

分 类 号：TF122[冶金工程—粉末冶金]