A novel method to prepare self-lubricity of Si3N4/Ag composite: Microstructure, mechanical and tribological properties

被引：24

作者：

Liu, Jiongjie ^{[1
,2
]}

Wang, Zixi ^{[3
]}

Yin, Bing ^{[1
]}

Yang, Jun ^{[1
]}

Sun, Qichun ^{[1
,2
]}

Liu, Yulin ^{[1
,2
]}

Tan, Hui ^{[1
,2
]}

Qiao, Zhuhui ^{[1
,4
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou, Gansu, Peoples R China

[2] Univ Chinese Acad Sci, Beijing, Peoples R China

[3] Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing, Peoples R China

[4] Qingdao Ctr Resource Chem & New Mat, Qingdao, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2018年 / 101卷 / 09期

基金：

中国国家自然科学基金;

关键词：

in situ reinforcement; mechanical and tribological properties; nano-Ag particles; Si3N4; Ag composite; SILICON-NITRIDE; BEHAVIOR; SILVER; WEAR;

D O I：

10.1111/jace.15569

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Si3N4/Ag composites were firstly prepared through SPS technology, using Si3N4 and AgNO3 as raw materials. Utilizing the coordination bonding of Ag+ ions with nitrogen atoms of Si3N4, in situ generated Ag particles about 1 m were tightly anchored on Si3N4 surface, thereby preventing the outflow of silver during sintering process. Meanwhile, smaller silver particles about 20 nm were located at the grain boundaries of Si3N4, which effectively improved the mechanical and tribological properties of Si3N4-based composites. Finally, the Si3N4/Ag composites reinforced by Ag particles showed a friction coefficient of 0.48 +/- 0.01, wear rate of 1.79 x 10(-6) mm(3) N-1 m(-1) and fracture toughness of 7.05 +/- 0.2 MPa m(1/2), respectively.

引用

页码：3745 / 3748

页数：4

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