采用热压法制备了80.6%B4C/11.6%TiB2/4.7%Mo/3%C质量分数陶瓷复合材料,分析了烧结工艺对力学性能和微观结构的影响.烧结温度变化范围是1800～1950℃,保温时间变化范围是15～60min,烧结压力30～35MPa.当烧结参数为1900℃、45min、35MPa,B4C/TiB2/Mo/C陶瓷复合材料抗弯强度、硬度、韧性、相对密度分别为705MPa、20.6GPa、3.82MPa·m1/2、98.2%.
80.6wt.%B4C/11.6wt.%TiB2/4.7wt%Mo/3wt.%C ceramic composite is fabricated by hot-pressing sintering and the effect of sintering temperature, holding time and pressure on mechanical properties and microstructure of the composite are analyzed. The temperature is raised from 1800℃ to 1950℃, the holding time ranges from 15min to 60min and the pressure is 30-35MPa. The strength, hardness, toughness and densification of the composite prepared by the optimized process of 1900℃ under 35MPa for 45min are 705MPa, 20.6GPa, 3.82MPa·m1/2, 98.2%, respectively.
参考文献
| [1] | 邓建新,张希华.B4C/SiCw陶瓷喷砂嘴的制备及其冲蚀磨损机理研究[J].硅酸盐通报,2004(03):18-20. |
| [2] | Deng Jianxin;Zhou Jun;Feng Yihua;Ding Zeliang .Microstructure and Mechanical Properties of Hot-Pressed B4C/(W,Ti)C Ceramic composites[J].Ceramics International,2002,28:425-430. |
| [3] | Hideo Awaji;Seong-Min Choi;Eisuke Yagi .Mechanisms of Toughening and Strengthening in Ceramic-based Nanocomposites[J].Mechanics of Materials,2002,34(07):411-422. |
| [4] | Kotoul M.;Vrbka J. .Crack bridging and trapping mechanisms used to toughen brittle matrix composite[J].Theoretical and Applied Fracture Mechanics,2003(1):23-44. |
| [5] | Fantozzi G.;Dubois J. .Densification, Microstructure and Mechanical Properties of TiB_2-B_4C Based Composites[J].International Journal of Refractory Metals & Hard Materials,1996(5/6):305-310. |
| [6] | Sigl L S .Processing and Mechanical Properties of Boron Carbide Sintered with TiC[J].Journal of the European Ceramic Society,1998,18:1521-1529. |
| [7] | Kustas F.;Zhou J.;Mishra B. .Wear behavior of B4C-Mo co-sputtered wear coatings[J].Surface & Coatings Technology,2001(1):48-54. |
| [8] | Zhen Yuhua;Li Aiju;Yin Yansheng;Shi Ruixia;Liu Yingcai .Reactive and dense sintering of reinforced-toughened B_4C matrixcomposites[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2004(11):1615-1625. |
| [9] | Richerson D W.Modern Ceramic Engineering[M].New York:Marcel Dekker,1982:78. |
| [10] | J. L. Shi .Solid state sintering of ceramics:pore microstructure models, densification equations and applications[J].Journal of Materials Science,1999(15):3801-3812. |
| [11] | Cui Guoweng.Defect,Diffusion and Sintering[M].北京:清华大学出版社,1990:175-182. |
| [12] | Coble R L;Kingery W D .Effect of Porosity on Physical Properties of Sintered Alumina[J].Journal of the American Ceramic Society,1956,39:377-385. |
| [13] | Guo Shiju.Powder Sintering Theory[M].北京:冶金工业出版社,1998:12. |
| [14] | 宋桂明,吴士平,吴洪飞,周玉.加压烧结工艺对碳纤维增强TiC复合材料力学性能的影响[J].粉末冶金技术,2001(06):323-326. |
| [15] | Knudsen F P .Dependence of the Mechanical Properties of Brittle Polycrystalline Specimens on Porosity and Grain Size[J].Journal of the American Ceramic Society,1959,42:376-387. |
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