Plasticity in ZrB2 micropillars induced by anomalous slip activation

被引：29

作者：

Csanadi, Tamas ^{[1
]}

Szommer, Peter ^{[2
]}

Chinh, Nguyen Q. ^{[2
]}

Grasso, Salvatore ^{[3
]}

Dusza, Jan ^{[1
,4
]}

Reece, Mike ^{[3
]}

机构：

[1] Slovak Acad Sci, Inst Mat Res, Kosice 04353, Slovakia

[2] Eotvos Lorand Univ, Dept Mat Phys, H-1117 Budapest, Hungary

[3] Queen Mary Univ London, Sch Engn & Mat Sci, London E1 4NS, England

[4] Obuda Univ, Donat Banki Fac Mech & Safety Engn, H-1081 Budapest, Hungary

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2016年 / 36卷 / 03期

基金：

英国工程与自然科学研究理事会; 匈牙利科学研究基金会;

关键词：

Zirconium diboride; Micropillar compression; Slip activation; Plasticity; Anisotropy; SINGLE-CRYSTALS; DEFORMATION; DIBORIDES; ZIRCONIUM; COMPOSITES; ANISOTROPY; STRENGTH; FRACTURE;

D O I：

10.1016/j.jeurceramsoc.2015.10.035

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：

Room temperature deformation behaviors of ZrB2 micropillars, fabricated by focused ion beam technique from differently oriented grains of polycrystalline ZrB2, were investigated under micro compression. Considerable anisotropy was found showing similar to 80% higher yield (sigma(Y)) and rupture (sigma(r)) stress values for the basal oriented pillars (sigma(Y,basal) =13.4 GPa, sigma(r,basal) = 13.4 GPa) compared to the prismatic pillars (sigma(Y,prism) = 6.4 GPa, sigma(r,prism) = 7.6 GPa). Micro-scale plasticity was detected in prismatic oriented pillars, revealing the activation of the {10 (1) over bar0} (11 (2) over bar3) type slip system both in the form of single- and multiple-slip which is anomalous for ZrB2 and has not been reported so far in the relevant literature. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：389 / 394

页数：6

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