WC/Co粉体粒径匹配与放电等离子烧结致密化

金属学报

2009, Vol. 45

Issue (4): 497-502

论文

本期目录 | 过刊浏览

WC/Co粉体粒径匹配与放电等离子烧结致密化

赵世贤;宋晓艳;王明胜;魏崇斌;张久兴;刘雪梅

北京工业大学材料学院新型功能材料教育部重点实验室; 北京 100124

MATCHING OF PARTICLE SIZES OF WC/Co POWDERS AND SPARK PLASMA SINTERING DENSIFICATION

ZHAO Shixian; SONG Xiaoyan; WANG Mingsheng; WEI Chongbin; ZHANG Jiuxing; LIU Xuemei

Key Laboratory of Advanced Functional Materials; Ministry of Education; School of Materials Science and Engineering; Beijing University of Technology; Beijing 100124

引用本文:

赵世贤宋晓艳王明胜魏崇斌张久兴刘雪梅. WC/Co粉体粒径匹配与放电等离子烧结致密化[J]. 金属学报, 2009, 45(4): 497-502.
, , , , , . MATCHING OF PARTICLE SIZES OF WC/Co POWDERS AND SPARK PLASMA SINTERING DENSIFICATION[J]. Acta Metall Sin, 2009, 45(4): 497-502.

全文: PDF(1578 KB)

摘要:

对放电等离子烧结(SPS)不同粒径匹配的WC/Co混合粉末的收缩过程进行了系统分析.结果表明, SPS烧结不同WC粒径混合粉末时, 烧结体开始收缩温度、收缩速率峰值温度和致密化完成温度基本相同; 对不同Co粒径混合粉末, 三种温度随Co粉初始粒径的减小而降低, 即SPS烧结过程与WC粒径无关而与Co粒径密切相关. SPS致密化过程中收缩速率随温度的变化、收缩速率与相对密度的关系均与常规烧结不同, 其开始收缩温度和收缩速率峰值温度均较常规烧结低, 同时收缩速率峰值处所对应的相对密度也较常规烧结低. 这说明在常规烧结中粉末在大量液相出现(即收缩速率出现峰值时)之前已完成很大程度的收缩致密化, 而SPS烧结中大量液相出现之前粉末的收缩致密化程度较低.

关键词 ：放电等离子烧结(SPS), WC/Co混合粉末, 收缩速率, 粒径匹配

Abstract：

The particle size of raw powders to prepare the cemented carbides plays a significant role not only in the properties of the resultant bulk material, but also in the sintering process. WC/Co composite powders with various size matches were prepared by spark plasma sintering (SPS), and the variations of shrinkage rate, which is an important factor describing SPS process, with the sintering temperature and the relationship between the shrinkage rate and the relative density of the sintered sample were analyzed. The results show that the temperature of shrinkage starting, the temperature corresponding to the peak of the shrinkage rate, and the temperature of full densification are almost the same for different sized WC particles, however, all of the above temperatures reduce with the decrease of the Co particle size. It indicates that the shrinkage process of SPS has a rather very weak relationship with the WC particle size, whereas has a close relationship with the Co particle size. As compared with the conventional sintering methods, the above temperatures and the relative density corresponding to the maximum of the shrinkage rate are all lowered. It implies that in the conventional process, at the stage with the maximum of the shrinkage rate, most of the shrinkage has been accomplished. However, in the SPS process, at the same stage the shrinkage degree is lower. Finally, he secial SPS mechanisms for comosite powders with various size matces were analyzed.

Key words： spark plasma sintering(SPS) WC/Co composite powder shrinkage rate particle size matching

收稿日期: 2008-09-16

ZTFLH:

TG146

基金资助:

国家自然科学基金项目50671001, 新世纪优秀人才支持计划项目NCET--06--0182, 高等学校博士学科点专项科研基金项目20070005010及北京特色新材料产业关键技术研发攻关项目Z08000003220000资助

作者简介: 赵世贤, 男, 1981年生, 博士生

	服务

	把本文推荐给朋友
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	赵世贤
	宋晓艳
	王明胜
	魏崇斌
	张久兴
	刘雪梅
44.8K

链接本文:

https://www.ams.org.cn/CN/ 或 https://www.ams.org.cn/CN/Y2009/V45/I4/497

[1] Petersson A, Agren J. Acta Mater, 2005; 53: 1665
[2] Porat R, Berger S, Rosen A. NanoStruct Mater, 1996; 7:429
[3] Upadhyaya G S. Mater Des, 2001; 22: 483
[4] Fang Z, Maheshwari P, Wang X, Sohn H Y, Grffo A, Riley R. Int J Refract Met Hard Mater, 2005; 23: 249
[5] Sanchez J M, Ordonez A, Gonzalez R. Int J Refract Met Hard Mater, 2005; 23: 193
[6] Menezes R R, Kiminami R H G A. J Mater Process Technol, 2008; 203: 513
[7] Breval E, Cheng J P, Agrawal D K, Gigl P, Dennis M, Roy R, Papworth A J. Mater Sci Eng, 2005; A391: 285
[8] Shigeru I, Mayu K, Takashi F, Takashi I. J Magn Magn Mater, 2004; 270: 15
[9] Sanchez J M, Ordonez A, Gonzalez R. Int J Refract Met Hard Mater, 2005; 23: 193
[10] Diletta S, Stefano G, Mats N. Scr Mater, 2008; 59: 638
[11] Sun L, Jia C C, Cao R J, Lin C G. Int J Refract Met Hard Mater, 2008; 26: 357
[12] Liu X Q, Lin T, Shao H P, Guo Z M, Luo J, Hao J J. Rare Met, 2008; 27: 320
[13] Sivaprahasam D, Chandrasekar S B, Sundaresan R. Int J Refract Met Hard Mater, 2007; 25: 144
[14] Allibert C H. Int J Refract Met Hard Mater, 2001; 19: 53
[15] Zhao S X, Song X Y, Zhang J X, Liu X M. Acta Metall Sin, 2007; 43: 107
(赵世贤, 宋晓艳, 张久兴, 刘雪梅. 金属学报, 2007; 43: 107)
[16] Zhao S X, Song X Y, Zhang J X, Liu X M. Mater Sci Eng, 2008; A473: 323
[17] Cha S I, Hong S H, Kim B K. Mater Sci Eng, 2003; A351: 31
[18] Kim H C, Oh D Y, Shon I J. Int J Refract Met Hard Mater, 2004; 22: 197
[19] Mamoru O. Mater Sci Eng, 2000; A287: 183
[20] Liu X M, Song X Y, Zhang J X, Zhao S X. Mater Sci Eng, 2008; A488: 1
[21] Arato P, Bartha L, Porat RBerger S B, Rosen A. NanoStruct Mater, 1998; 10: 245
[22] Petersson A. Int J Refract Met Hard Mater, 2004; 22: 211
[23] Song X Y, Liu X M, Zhang J X. Sci China, 2005; 35E: 459
(宋晓艳, 刘雪梅, 张久兴. 中国科学, 2005; 35E: 459)
[24] Song X Y, Liu X M, Zhang J X. J Am Ceram Soc, 2006; 89: 494

[1]	潘昆明,张来启,魏世忠,李继文,李豪,林均品. Mo-Si-B三元系中T2相合金的制备工艺研究^*[J]. 金属学报, 2015, 51(11): 1377-1383.

Viewed

Full text

Abstract

Cited

Shared

Discussed