为研究纳米复合碳化钨-钴粉末的分散稳定性和粒度表征方法,以一定量分散介质和分散剂作用于纳米复合碳化钨-钴粉末,利用氮吸附法(BET)、光子相关光谱法(PCS)和电位分析仪分别测试了粉末的比表面积、粒度及其分布和粉末的ζ电位.研究结果表明:高比重的纳米复合碳化钨-钴粉末经一定工艺处理后具有相当的分散稳定性,但长时间球磨对分散并非有利;用BET可表征一次粒径,而PCS则表征二次粒径.
参考文献
| [1] | Ban ZG.;Shaw LL. .Synthesis and processing of nanostructured WC-Co materials[J].Journal of Materials Science,2002(16):3397-3403. |
| [2] | Azcona I.;Ordonez A.;Sanchez JM.;Castro F. .Hot isostatic pressing of ultrafine tungsten carbide-cobalt hardmetals[J].Journal of Materials Science,2002(19):4189-4195. |
| [3] | PORAT R;BERGER S;ROSEN A.Cemented carbide from micron grain size to nano size[A].,1997:183-196. |
| [4] | T. Ungar A. Borbely .Particle-size, size distribution and dislocations in nanocrystalline tungsten-carbide[J].Nanostructured Materials,1999(1):103-113. |
| [5] | LAARZ E;BERGSTROM L .Dispersing WC -Co powder in aqueous media with polyethylenimine[J].International Journal of Refractory Metals and Hard Materials,2000,18:281-286. |
| [6] | 邵刚勤;段兴龙;谢济仁 等.无η相碳化钨-钴纳米复合粉末的工业化制备技术[P].CN:99116597,1999. |
| [7] | Shao G Q;WU B L;Duan X L.Nanocrystalline grains & superfine particles of tungsten carbide-cobalt powders[A].Ohio:The American Ceramic Society,2000:375-383. |
| [8] | Pecora R.Dynamic Light Scattering:Applications of Photon Correlation Spectroscopy[M].New York: Plenum Press,1985 |
| [9] | MORRISON I D;GRABOW SPI E F;HERB C A .Improved Technique for Particle Size Determination by QELS[J].Langmuir,1985,1:496-501. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%