Nanoindentation of WC-Co hardmetals

被引：64
|
作者：
Duszova, Annamaria [1 ]
Halgas, Radoslav [1 ,2 ]
Bl'anda, Marek [1 ,2 ]
Hvizdos, Pavol [1 ]
Lofaj, Frantisek [1 ]
Dusza, Jan [1 ,3 ]
Morgiel, Jerzy [4 ]
机构：
[1] Slovak Acad Sci, Inst Mat Res, Kosice 04353, Slovakia
[2] Fac Mat Sci & Technol STU, Trnava 91724, Slovakia
[3] Obuda Univ, Donat Banki Fac Mech & Safety Engn, H-1428 Budapest, Hungary
[4] Polish Acad Sci, Inst Met & Mat Sci, PL-30059 Krakow, Poland
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2013年 / 33卷 / 12期
关键词：
WC crystals; Nanoindentation; Hardness; Load-size effect; Orientation effect; HARDNESS; CRYSTALS; MODULUS; WC/CO; SLIP;
D O I：
10.1016/j.jeurceramsoc.2012.12.018
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：
WC-Co cemented carbide has been investigated using instrumented indentation with maximum applied loads from 0.1 to 10 mN. The hardness and indentation modulus of individual phases and the influence of crystallographic orientation of WC on the hardness and indentation modulus have been studied. The hardness of the Co binder was approximately 10 GPa and that of WC grains up to 50 GPa with relatively large scatter under the indentation load of 1 mN. Investigation of the role of crystallographic orientation of WC grains on hardness at 10 mN load revealed average values of H-ITbasal = 40.4 GPa (E-ITbasal = 674 GPa) and H-ITprismatic = 32.8 GPa (E-Itprismatic = 542 GPa), respectively. The scatter in the measured values at low indentation loads is caused by the effects of surface and sub-surface characteristics (residual stress, damaged region) and at higher loads by "mix-phase" volume below the indenter. (C) 2013 Elsevier Ltd. All rights reserved.
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收藏
页码：2227 / 2232
页数：6
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