通过热压烧结制备SiC(W)-ZrO2-MoSi2复相陶瓷,利用X射线衍射仪、图像分析仪、透射电镜对复相陶瓷试样组织结构进行了研究,探讨了SiC(W)-ZrO2协同作用对MoSi2陶瓷性能的影响.结果表明:纳米ZrO2颗粒的加入对材料的细化作用较SiC晶须明显,复相协同作用细化效果更好.SiC(W)-ZrO2协同作用的综合机制有利于提高复相陶瓷的抗弯强度和断裂韧性,ZrO2量的增加对提高复相陶瓷断裂韧性的作用更明显;ZrO2粒子钉扎位错,导致可动位错绕过,强化材料基体.弥散分布的SiC晶须阻碍位错运动,使位错缠结、交割,阻碍晶界迁移;粒子周围出现孪晶以及SiC晶须引起的层错,阻碍其晶粒长大.
参考文献
| [1] | Vasudevan A K;Petrovic J J .A comparative overview of molybdenum disilicide composites[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1991,A155(1-2):1-17. |
| [2] | 李玲艳,艾云龙,程玉桂,刘长虹.MoSi2及其复合材料的研究进展[J].宇航材料工艺,2005(01):10-14. |
| [3] | 冯培忠,曲选辉,王晓虹,杜学丽.二硅化钼材料复合强韧化的研究进展[J].材料导报,2005(09):12-15. |
| [4] | SUN Lan;PAN Jin-sheng;LIU Ya-jun .An improvement in processing and fabrication of SiC-whisker-reinforced MoSi2 composites[J].Journal of Materials Science Letters,2001,20(15):1421-1423. |
| [5] | Qiaodan Hu;Peng Luo;Youwei Yan .Microstructures and densification of MoSi_2-SiC composite by field-activated and pressure-assisted combustion synthesis[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):136-142. |
| [6] | Kh. V. Manukyan;S.L. Kharatyan;G. Blugan .MoSi_2-Si_3N_4 composites: Influence of starting materials and fabrication route on electrical and mechanical properties[J].Journal of the European Ceramic Society,2009(10):2053-2060. |
| [7] | 刘伯威,潘进,樊毅,张金生.（SiCp+C）/MOSi2复合材料的组织结构及力学性能[J].中国有色金属学报,2001(04):631-637. |
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%