热压烧结制备了不同TiN含量的复合陶瓷刀具材料TiB2-TiN-(Ni, Mo),对其性能测试表明,随着TiN含量的增加,材料的抗弯强度和断裂韧度逐渐提高,但是材料的硬度在TiN的含量达到40%(体积分数)时却大幅度降低.利用X衍射(XRD)、扫描电镜(SEM)和能谱(EDAX)分析了复合材料的物相和显微组织,结果表明,烧结过程中生成了MoNi相;随TiN含量增加,材料从以沿晶断裂为主转变为同时有沿晶断裂和穿晶断裂的断裂模式;裂纹扩展过程中有金属颗粒桥连现象.分析认为,材料的主要增韧机制是延性相颗粒桥连和裂纹偏转.
参考文献
| [1] | WANG W M;FU Z Y;WANG H et al.Influence of hot pressing sintering temperature and time on microstructure and mechanical properties of TiB2 ceramics[J].Journal of the European Ceramic Society,2002,22:1045-1049. |
| [2] | Zhang GJ.;Yue XM.;Jin ZZ. .EFFECTS OF NI ADDITION ON MECHANICAL PROPERTIES OF TIB2/SIC COMPOSITES PREPARED BY REACTIVE HOT PRESSING (RHP)[J].Journal of Materials Science,1997(8):2093-2097. |
| [3] | Mari-Ann Einarsrud;Eirik hagen;Gunnar Pettersen .Pressureless sintering of titanium diboride with nickel, nickel boride, and Iron additives[J].Journal of the American Ceramic Society,1997(12):3013-3020. |
| [4] | 苗明清,傅正义,张金咏,龚伦军.TiB2基金属陶瓷的显微结构与力学性能[J].复合材料学报,2005(01):64-67. |
| [5] | GONZALEZ R;BARANDIKA M G;ONA D et al.New binder phases for the consolidation of TiB2 hardmetals[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1996,216:185-192. |
| [6] | Bhaumik SK.;Singh AK.;Upadhyaya GS.;Divakar C. .Synthesis and sintering of TiB2 and TiB2-TiC composite under high pressure[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1/2):275-281. |
| [7] | LI L H;KIM H K;KANG E S .Sintering and mechanical properties of titanium diboride with aluminum nitride as a sintering aid[J].Journal of the European Ceramic Society,2002,22:973-977. |
| [8] | 李荣久.陶瓷-金属复合材料[M].北京:冶金工业出版社,2004 |
| [9] | 理查德 J 布鲁克.陶瓷工艺(17A卷)[M].北京:科学出版社,1999 |
| [10] | BAUMGARTNER H R;STEIGER R A .Sintering and properties of titanium diboride made from powder synthesized in a plasma-arc heater[J].Journal of the American Chemical Society,1984,67(03):207-212. |
| [11] | 穆柏春.陶瓷材料的强韧化[M].北京:冶金工业出版社,2002 |
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%