以费氏粒度为8.06 μm 的WC粉与Co(NO3)2·6H2O为原料,采用N(CH2CH2OH)3(TEA)为还原剂制备WC-12%Co(质量分数)包裹粉,以包裹粉为原料制备WC-12%Co硬质合金.采用扫描电镜观察包裹粉与合金中WC晶粒的立体形貌,采用X射线衍射仪分析粉末的物相组成,采用比表面积分析仪分析TEA还原产物多孔泡沫Co的比表面积,采用金相显微镜观察合金的组织结构.结果表明:包裹粉中Co为纯fcc高温相结构,呈多孔泡沫状纳米组装结构形式包裹在WC粉末表面;WC-12%Co合金组织结构均匀,平均晶粒度为4.8 μm,WC晶粒结晶完整、呈规则多面体形状.
参考文献
[1] | Sandvik Hard Materials .Technical info\understanding cemented carbide grain size[EB/OL].http://www.sandvik.com,2004-11-04. |
[2] | (A)KERMAN J;ERICSON T .Cemented carbide body with improved high temperature and thermomechanical properties[P].USA 6,692,690,2004-02-17. |
[3] | MADERUD J;ERICSON T;FISCHER U .Roll for hot rolling with increased resistance to thermal cracking and wear[P].USA 5,902,942,1999-05-11. |
[4] | 张立,王元杰,余贤旺,王振波.WC粉末粒度与形貌对硬质合金中WC晶粒度、晶粒形貌与合金性能的影响[J].中国钨业,2008(04):23-26. |
[5] | 周新华,王力民.球磨时间对粗晶硬质合金性能的影响[J].硬质合金,2008(01):23-27. |
[6] | 张立,王元杰,余贤旺,陈述,熊湘君.干混合对硬质合金组织结构的影响[J].硬质合金,2007(01):24-27. |
[7] | Kitakami O.;Shimada Y.;Sato F.;Tanaka M.;Sato H. .SIZE EFFECT ON THE CRYSTAL PHASE OF COBALT FINE PARTICLES[J].Physical Review.B.Condensed Matter,1997(21):13849-13854. |
[8] | Zhao XQ;Veintemillas-Verdaguer S;Bomati-Miguel O;Morales MP;Xu HB .Thermal history dependence of the crystal structure of Co fine particles[J].Physical review, B. Condensed matter and materials physics,2005(2):4106-1-4106-7-0. |
[9] | 孟庆平,戎咏华,徐祖耀.The structural stability in nano-sized crystals of metals[J].中国科学E辑(英文版),2002(05):485-494. |
[10] | 高金萍,张久兴,宋晓艳,刘雪梅.纳米晶材料热力学函数及其在相变热力学中的应用[J].功能材料,2004(z1):2647-2652. |
[11] | Soumya K. Biswas;A. Pathak;N.K. Pramanik .Codoped Cr and W rutile nanosized powders obtained by pyrolysis of triethanolamine complexes[J].Ceramics International,2008(8):1875-1883. |
[12] | WANG Guang-jun;WANG De-zhi .Development of copper coatings on molybdenum powders by electroless plating technique[J].Transactions of Nonferrous Metals Society of China,2007,17(s):803-807. |
[13] | 柳强,田从学,张昭.复合模板合成介孔二氧化钛分子筛及其脱模[J].中国有色金属学报,2007(05):807-812. |
[14] | C.R.K. Rao;D.C. Trivedi .Synthesis and characterization of fatty acids passivated silver nanoparticles-their interaction with PPy[J].Synthetic Metals,2005(2):324-327. |
[15] | 施晶莹,冷文华,程小芳,张昭,张鉴清,曹楚南.钴氮共掺杂TiO2薄膜的制备及其光电化学性质[J].中国有色金属学报,2007(09):1536-1542. |
[16] | ZHANG Li,CHEN Shu,WANG Yuan-jie,YU Xian-wang,XIONG Xiang-jun.Tungsten carbide platelet-containing cemented carbide with yttrium containing dispersed phase[J].中国有色金属学会会刊(英文版),2008(01):104-108. |
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