Layered atomic structures of double oxides for low shear strength at high temperatures

被引：158

作者：

Stone, D. ^{[1
]}

Liu, J. ^{[2
]}

Singh, D. P. ^{[1
]}

Muratore, C. ^{[3
]}

Voevodin, A. A. ^{[3
]}

Mishra, S. ^{[4
]}

Rebholz, C. ^{[5
]}

Ge, Q. ^{[2
]}

Aouadi, S. M. ^{[1
]}

机构：

[1] So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA

[2] So Illinois Univ, Dept Chem, Carbondale, IL 62901 USA

[3] USAF, Res Lab, Mat & Mfg Directorate, Wright Patterson AFB, OH 45433 USA

[4] Univ Memphis, Dept Phys, Memphis, TN 38152 USA

[5] Univ Cyprus, Dept Mech & Mfg Engn, CY-1678 Nicosia, Cyprus

来源：

SCRIPTA MATERIALIA | 2010年 / 62卷 / 10期

基金：

美国国家科学基金会;

关键词：

Friction; Raman spectroscopy; Crystal structure; Oxides; Ab initio calculations; AUGMENTED-WAVE METHOD; NANOCOMPOSITE COATINGS; TRIBOLOGICAL PROPERTIES; CHAMELEON COATINGS; RAMAN-SPECTROSCOPY; THIN-FILMS; SILVER; LUBRICANT; MOLYBDATE; ENVIRONMENTS;

D O I：

10.1016/j.scriptamat.2010.02.004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Double oxide phases combining a transition metal and a noble metal have recently become a subject of investigation as solid lubricant materials for high-temperature tribological applications. Here, we study the changes in chemistry and crystal structure of silver molybdate (Ag2Mo2O7) and silver tungstate (Ag2WO4) thin films and powders from 25 to 600 degrees C. We show, using ab initio molecular dynamics, high-temperature X-ray diffraction, high-temperature Raman spectroscopy and differential scanning calorimetry in combination with sliding tests, that the layered atomic structure of silver molybdate facilitates sliding, resulting in a low coefficient of friction (<0.2) from 300 to 500 degrees C. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：735 / 738

页数：4

共 26 条

[1] Tribological investigation of adaptive Mo2N/MoS2/Ag coatings with high sulfur content [J].