以纳米TiB2和微米TiB2为基体,WC为增强相,h-BN为固体润滑剂,采用热压工艺制备了TiB2/WC/h-BN纳微米复合梯度自润滑陶瓷材料,并测量了其力学性能.结果表明:与均质TiB2/WC/h-BN微米自润滑陶瓷材料相比,其抗弯强度、断裂韧性与硬度分别提高了15.8%、6.7%和11.1%.用压痕法测量得到材料内部的残余应力,其应力值呈明显的阶梯变化趋势,且关于中间层对称分布,材料表层存在残余压应力,可有效提高材料力学性能与使用性能.显微结构观察显示,TiB2/WC/h-BN纳微米复合梯度自润滑陶瓷材料晶粒细小、均匀,纳米TiB2颗粒分布均匀,材料断裂模式为典型的穿晶/沿晶混合断裂模式.
参考文献
[1] | HUANG Chuanzhen;LIU Hanlian;WANG Jun;WANG Hui .MULTI-SCALE AND MULTI-PHASE NANOCOMPOSITE CERAMIC TOOLS AND CUTTING PERFORMANCE[J].Chinese journal of mechanical engineering,2007(5):5-7. |
[2] | 王黎钦,应丽霞,古乐,张三川.固体自润滑复合材料研究进展及其制备技术发展趋势[J].机械工程师,2002(09):6-8. |
[3] | Wei Chen;Yimin Gao;Can Chen;Jiandong Xing .Tribological characteristics of Si_3N_4-hBN ceramic materials sliding against stainless steel without lubrication[J].Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear,2010(3/4):241-248. |
[4] | 自润滑Al2O3/TiC/CaF2复合陶瓷材料摩擦特性[J].人工晶体学报,2012(06):1741-1746. |
[5] | D. WEI;Q. MENG;D. JIA .Mechanical and tribological properties of hot-pressed h-BN/Si_3N_4 ceramic composites[J].CERAMICS INTERNATIONAL,2006(5):549-554. |
[6] | J. DENG;T. CAN;J. SUN .Microstructure and mechanical properties of hot-pressed Al_2O_3/TiC ceramic composites with the additions of solid lubricants[J].Ceramics International,2005(2):249-256. |
[7] | 许崇海,肖光春,张永莲.层数对梯度自润滑陶瓷刀具材料Al2O3/TiC/CaF2残余应力的影响[J].人工晶体学报,2013(10):2114-2120. |
[8] | 赵军,艾兴,张建华,黄传真.梯度功能陶瓷刀具材料的残余应力设计及制备[J].硅酸盐学报,1998(03):292-299. |
[9] | Julfikar Haider;Mahfujur Rahman;Brian Corcoran .Simulation of thermal stress in magnetron sputtered thin coating by finite element analysis[J].Journal of Materials Processing Technology,2005(1):36-41. |
[10] | 叶乃清,曾照强,胡晓清,苗赫濯.BN-YAION复合陶瓷的烧结行为[J].硅酸盐学报,1998(02):268-272. |
[11] | 宋培龙,杨学锋,王守仁,杨丽颖,王砚军,马涛.Al2O3-TiC/Al2O3-TiC-CaF2叠层陶瓷拉拔模具坯体的叠层结构优化分析[J].人工晶体学报,2013(11):2418-2424. |
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%