RESIDUAL STRESS AND FRACTURE TOUGHNESS OF PIRAC TITANIUM NITRIDE COATINGS

被引：2
|
作者：
Wu, Siyuan [1 ]
Zhang, Guoyun [2 ]
Wu, Shoujun [1 ]
Su, Yu [1 ]
机构：
[1] Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China
[2] Northwest A&F Univ, State Key Lab Crop Stress Biol Arid Areas, Yangling 712100, Shaanxi, Peoples R China
来源：
SURFACE REVIEW AND LETTERS | 2017年 / 24卷 / 04期
关键词：
Titanium nitride coating; PIRAC method; residual stress; fracture toughness; INDENTATION TECHNIQUES; TI-6AL-4V ALLOY; TIN; MICROSTRUCTURE; STRENGTH; WEAR; MODULUS;
D O I：
10.1142/S0218625X17500561
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, residual stress and fracture toughness of titanium nitride coatings prepared by powder immersion reaction assisted coating (PIRAC) at 700 degrees C with different processing times are studied. Results show that the residual stress in the coatings is compressive stress and increases with processing times increasing. Indentation fracture toughness of the PIRAC coatings increased with processing times ( coatings' thickness) increasing. The fracture toughness of the coatings prepared at 700 degrees C with a processing time of 144 h and 192 h is 6: 88 +/- 0: 20MPa .m(1/2) and 9: 15 +/- 0: 15MPa .m(1/2) 2, respectively. Bending induced crack propagation in the coating shows multi-deflection mode which is beneficial to energy absorption and thus improved fracture toughness.
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页数：8
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