TiC含量对碳纤维编织物增韧的WC-TiC-Ni层状陶瓷刀具性能的影响  

Effect of TiC content on the properties of WC-TiC-Ni layered ceramic toughened by carbon fiber braid

作　　者：安晶[1] 吕明[1] 宋金鹏[1] 梁国星[1] 张诚[1] AN Jing;LV Ming;SONG Jinpeng;LIANG Guoxing;ZHANG Cheng(College of Mechanical Engineering and Key Laboratory of Precision Manufacturing,Taiyuan University of Technology, Taiyuan 030024,China)

机构地区：[1]太原理工大学机械工程学院及精密加工山西省重点实验室,太原030024

出　　处：《功能材料》2017年第8期208-211,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51405326;51575375);山西省高等学校科技创新资助项目(2014122)

摘　　要：采用真空热压烧结技术,在1 500℃下制备了不同TiC含量的连续碳纤维编织物增韧的WC/TiC层状陶瓷刀具样品。研究了TiC的含量对连续碳纤维编织物增韧的WC/TiC层状陶瓷刀具材料微观组织和力学性能的影响,结果表明,随着TiC含量的增加,陶瓷刀具材料的抗弯强度、断裂韧度和硬度不断减小;当TiC含量为20%(质量分数)时,材料的致密度较高,晶粒尺寸较小,因此力学性能较好;此时,抗弯强度为516.896 MPa,断裂韧度为8.3871 MPa·m^(1/2),硬度为17.341GPa。WC/TiC layered ceramic cutting tools,with different TiC content,toughened by carbon fiber braid were fabricated at1500°C by vacuum hot pressing sintering technique.The effect of TiC content on microstruc-ture and mechanical properties of WC/TiC layered ceramic tool materials toughened by carbon fiber braid was studied.The results showed that with the increase of TiC content,the bending strength,fracture toughness and hardness of ceramic cutting tool materials decreased.When the content of TiC was20wt%,the density of the material was higher and the grain size was smaller.Therefore,the best mechanical properties of the material were obtained.The bending strength,fracture toughness and the Vickers hardness of this sample were516.896MPa,8.3871MPa*m1/2,17.341GPa,respectively.

关 键 词：碳纤维编织物 陶瓷刀具 TiC含量 微观组织 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]