• CN:11-2187/TH
  • ISSN:0577-6686

›› 2000, Vol. 36 ›› Issue (11): 50-53.

• 论文 • 上一篇    下一篇

稀土增韧补强Al2O3/(W,Ti)C复相陶瓷刀具材料的研究

许崇海;李兆前;黄传真;邓建新;艾兴   

  1. 山东轻工业学院机电工程系;山东工业大学
  • 发布日期:2000-11-15

STUDY ON AN Al2O3/(W,Ti)C COMPOSITE CERAMIC TOOL MATERIAL REINFORCED AND TOUGHENED BY RARE EARTHS

Xu Chonghai;Li Zhaoqian;Huang Chuanzhen;Deng Jianxin;Ai Xing   

  1. Shandong Institute of Light Industry Shandong University of Technology
  • Published:2000-11-15

摘要: 研制出一种稀土补强Al 2O 3/(W,Ti)C新型陶瓷刀具材料,并对其增韧补强机制作了研究。表明:稀土元素的添加能以净化界面、提高界面结合强度以及纳米质点强化的作用机制显著提高Al 2O 3/(W,Ti)C陶瓷刀具材料的抗弯强度和断裂韧度。而且由于材料中强弱界面的共同存在,使得裂纹桥联、裂纹分支、裂纹偏转以及微裂纹等增韧机制得到明显增加和加强,从而以多种增韧机制及其相互作用共同提高稀土补强Al 2O 3/(W,Ti)C陶瓷刀具材料的断裂韧度。

关键词: 补强, 力学性能, 陶瓷刀具材料, 稀土元素, 增韧

Abstract: An advanced Al2O3/(W, Ti) C composite ceramic tool material reinforced by rare earth elements is developed, and the toughening and strengthening mechanisms are analyzed. Results show that it is the acting mechanisms of the added rare earth such as the purification of the interface, and then the increase of the interface bonding strength as well as the strengthening by nano-sized particles that result in the increase of the flexural strength and the fracture toughness of the ceramic tool material. Since the co-existing of both strong and weak interfaces, the toughening mechanisms like crack bridging, crack branching, crack defection and microcracking, etc. are noticeably increased and strengthened. Therefore, the fracture toughness of the Al2O3/(W,Ti) C ceramic tool material reinforced by rare earth is increased as a result of the interactions of several kinds of toughening mechanisms.

Key words: Ceramic tool material, Mechanical property, Rare earth element, Strengthening, Toughening

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