Influence of loading rate on nanohardness of sapphire

被引：36

作者：

Bhattacharya, Manjima ^{[1
]}

Dey, Arjun ^{[2
]}

Mukhopadhyay, Anoop Kumar ^{[1
]}

机构：

[1] Cent Glass & Ceram Res Inst, CSIR, Adv Mech & Mat Characterizat Div, Kolkata 700032, India

[2] ISRO Satellite Ctr, Thermal Syst Grp, Vimanapura Post, Bangalore 560017, Karnataka, India

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 12期

关键词：

Nanohardness; Loading rate; Pop-in; Nanoscale plasticity; Shear stress; Sapphire; CONTACT-INDUCED PLASTICITY; LIME-SILICA GLASS; MECHANICAL-PROPERTIES; SINGLE-CRYSTAL; POP-IN; DEFORMATION-BEHAVIOR; NUMERICAL-SIMULATION; INITIAL-STAGES; NANOINDENTATION; INDENTATION;

D O I：

10.1016/j.ceramint.2016.05.091

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：

This work reports the loading rate effect on nanohardness of sapphire. The intrinsic nanoscale contact deformation resistance of sapphire increased with the loading rates following empirical power law dependence with a positive exponent. The results showed a significant enhancement (e.g., similar to 66%) of the nanohardness of sapphire with the increase in loading rates from 10 to 10,000 mu N s(-1). These results were explained mainly in terms of the maximum shear stress generated underneath the nanoindenter, dislocation density and critical resolved shear stress of the sapphire. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：13378 / 13386

页数：9

共 68 条

[41] Nanoscale elastic-plastic deformation and stress distributions of the C plane of sapphire single crystal during nanoindentation [J].

Mao, W. G. ;

Shen, Y. G. ;

Lu, C. .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2011, 31 (10) :1865-1871

[42] Deformation behavior and mechanical properties of polycrystalline and single crystal alumina during nanoindentation [J].

Mao, W. G. ;

Shen, Y. G. ;

Lu, C. .

SCRIPTA MATERIALIA, 2011, 65 (02) :127-130

[43] Nanoindentation Study of Pop-in Phenomenon Characteristics and Mechanical Properties of Sapphire (10(1)over-bar2) Crystal [J].

Mao, Weiguo ;

Shen, Yaogen .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2012, 95 (11) :3605-3612

[44] Nanoindentation studies on Cu-Ti-Zr-Ni-Si-Sn bulk metallic glasses [J].

Mukhopadhyay, N. K. ;

Belger, A. ;

Paufler, P. ;

Kim, D. H. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2007, 449 :954-957

[45] Micro- and nanoindentation techniques for mechanical characterisation of materials [J].

Mukhopadhyay, N. K. ;

Paufler, P. .

INTERNATIONAL MATERIALS REVIEWS, 2006, 51 (04) :209-245

[46] Nanoindentation hardness anisotropy of alumina crystal: A molecular dynamics study [J].

Nishimura, Kenji ;

Kalia, Rajiv K. ;

Nakano, Aiichiro ;

Vashishta, Priya .

APPLIED PHYSICS LETTERS, 2008, 92 (16)

[47]

Normandia M.J., 2004, AMPTIAC Q, V8, P21

[48] Peculiar surface deformation of sapphire: Numerical simulation of nanoindentation [J].

Nowak, R ;

Manninen, T ;

Heiskanen, K ;

Sekino, T ;

Hikasa, A ;

Niihara, K ;

Takagi, T .

APPLIED PHYSICS LETTERS, 2003, 83 (25) :5214-5216

[49] Measurement of hardness and elastic modulus by instrumented indentation: Advances in understanding and refinements to methodology [J].

Oliver, WC ;

Pharr, GM .

JOURNAL OF MATERIALS RESEARCH, 2004, 19 (01) :3-20

[50] Initiation of shear bands near a stress concentration in metallic glass [J].

Packard, C. E. ;

Schuh, C. A. .

ACTA MATERIALIA, 2007, 55 (16) :5348-5358

← 1 2 3 4 5 6 7 →