Toughness enhancement in zirconium-tungsten-nitride nanocrystalline hard coatings

被引：7

作者：

Dubey, P. ^{[1
,2
]}

Srivastava, S. ^{[1
]}

Chandra, R. ^{[1
]}

Ramana, C. V. ^{[2
]}

机构：

[1] Indian Inst Technol Roorkee, Inst Instrumentat Ctr, Nano Sci Lab, Roorkee 247667, Uttar Pradesh, India

[2] Univ Texas El Paso, Dept Mech Engn, El Paso, TX 79968 USA

来源：

AIP ADVANCES | 2016年 / 6卷 / 07期

基金：

美国国家科学基金会;

关键词：

NANOCOMPOSITE COATINGS; THIN-FILMS; MECHANICAL-PROPERTIES; MICROSTRUCTURE; MODULUS; SYSTEM; RATIO;

D O I：

10.1063/1.4959224

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An approach is presented to increase the toughness (K-IC) while retaining high hardness (H) of Zr-W-N nanocrystalline coatings using energetic ions bombardment. Tuning K-IC and H values was made possible by a careful control over the substrate bias, i.e., the kinetic energy (U-k similar to 9-99 J/cm(3)) of the bombarding ions, while keeping the deposition temperature relatively low (200 degrees C). Structural and mechanical characterization revealed a maximum wear resistance (H/E-r similar to 0.23) and fracture toughness (K-IC similar to 2.25 MPa root m) of ZrWN coatings at Uk similar to 72 J/cm(3). A direct Uk-microstructure-K-IC-H relationship suggests that tailoring mechanical properties for a given application is possible by tuning U-k and, hence, ZrWN-coatings' microstructure. (C) 2016 Author(s).

引用

页数：7

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