通过机械合金化和热处理工艺成功地制备了 MoSi2+50 %(摩尔分数x) WSi2 复合粉末材料,利用 X 射线衍射手段分析了相的形成过程,并从热力学和球磨能量角度比较了 MoSi2 和 WSi2 相生成的难易程度.球磨40 h 后在高于 1000℃热处理可获得(Mo,W)Si2合金;因 G0(MoSi2)＜G0(WSi2),WSi2 相较 MoSi2 难生成,其所需球磨能量分别为 120.240 kJ/g 和 30.060 kJ/g.
MoSi2+50 mol% WSi2 powders were synthesized by means of mechanical alloying and heat treatment. Formation process of phases was characterized by X-ray diffraction. The difficult degree of formation of MoSi2 and WSi2 phases was compared in thermodynamics and milling energy. The results show that (Mo,W)Si2 alloy can be attained by milling for 40 h followed by heat treatment at more than 1000℃. WSi2 is more difficult to be synthesized than MoSi2 because of the free energy of MoSi2 is smaller. The milling energies required for formation of MoSi2 and WSi2 are 30.060 kJ/g and 120.240 kJ/g, respectively.Key Words: MoSi2,WSi2,Mechanical alloying, Heat treatment
参考文献
| [1] | Vasudevan A K;Petrovic J J .[J].Materials Science and Engineering,1992,A155:1. |
| [2] | Yen Y L;Lavernia E J .[J].Journal of Materials Science,1994,29:2557. |
| [3] | Petrovic J J .[J].Materials Science and Engineering,1999,A261:1. |
| [4] | Petrovic J J .[J].MRS Bulletin,1993,18(07):35. |
| [5] | 马勤;杨延清;康沫狂 .[J].材料导报,1997,11(02):61. |
| [6] | Niihara K;Suzukir Y .[J].Materials Science and Engineering,1999,A261:6. |
| [7] | Schwarz R B;Srinivasan S R;Petrovic J .[J].Materials Science and Engineering,1992,A155:75. |
| [8] | Subrahmanyam J;Mohan R R .[J].Materials Science and Engineering,1994,A183:205. |
| [9] | 寇开昌,杨延清,艾云龙,陈彦,康沫狂.MoSi2-WSi2复合体系的自蔓延燃烧合成[J].稀有金属材料与工程,2000(03):190-192. |
| [10] | 王德志,刘心宇,左铁镛,成钧,钱介文.球磨条件对MoSi2形成的影响[J].中国有色金属学报,1998(04):600-604. |
| [11] | Masslki T B;Murray J L;Bennett J I .OH:ASM[Z].,1986. |
| [12] | 柳林;秦勇 .球磨能量对Mo-Si混合粉末机械合金化的影响[J].金属学报,1996,32(04):423. |
| [13] | Pankraiz L B .Thermodynamic Properties of Elements and Oxides. Bu Mine Bull.672[D].United States Department of the Interior Bureau of Mines,1982. |
| [14] | 梁英教;李荫昌.无机物热力学数据手册[M].沈阳:东北大学出版社,1993 |
| [15] | Murty B S;Mohan Rao M;Ranganathan S .[J].冶金材料学报,1995,43(06):2443. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%