Estimation of fracture toughness in ZnO ceramics from indentation crack opening displacement measurements

被引：8
作者：
Roy, Tapatee Kundu [1 ]
机构：
[1] Variable Energy Cyclotron Ctr, 1-AF Bidhan Nagar, Kolkata 700064, India
来源：
MEASUREMENT | 2019年 / 137卷
关键词：
Fracture toughness; Vickers indentation; Crack opening displacements; Scanning electron microscopy; ZnO ceramics; OXIDE; HARDNESS;
D O I：
10.1016/j.measurement.2019.01.069
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Crack opening displacement (COD) approach on indentation cracks has been successfully utilized in evaluating the fracture toughness of sintered ZnO samples. The study has been conducted on two varieties of sintered samples, made from commercial and ground ZnO powder, with applied loads of 9.8 and 19.6 N in a Vickers hardness tester. Crack opening profiles along the crack length have been measured by scanning electron microscopy (SEM). Fracture toughness in the ground and sintered ZnO sample has been estimated as 2.44 MPa.m(0.5) using the crack displacement data for the full length. The slightly lower toughness of 2.10-2.16 MPa.m(0.5) measured in the commercial variety of sintered ZnO has been related to the lesser plain strain modulus corresponding to lower density value. The obtained results are within 10% variation of the fracture toughness measured using indentation crack length method for the similar variety of ZnO samples. Irwin's equation validates the fracture toughness results for the near tip data, within 5 mu m from the crack tip. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：588 / 594
页数：7
相关论文
共 34 条
  • [1] [Anonymous], 2012, NEW CONTRIBUTIONS R
  • [2] [Anonymous], 1988, ANN BOOK ASTM STAND, V4.02
  • [3] A CRITICAL-EVALUATION OF INDENTATION TECHNIQUES FOR MEASURING FRACTURE-TOUGHNESS .1. DIRECT CRACK MEASUREMENTS
    ANSTIS, GR
    CHANTIKUL, P
    LAWN, BR
    MARSHALL, DB
    [J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1981, 64 (09) : 533 - 538
  • [4] Defect induced d0 ferromagnetism in a ZnO grain boundary
    Aravindh, Sasikala Devi Assa
    Schwingenschlogl, Udo
    Roqan, Iman S.
    [J]. JOURNAL OF CHEMICAL PHYSICS, 2015, 143 (22)
  • [5] Highly conductive and transparent reduced graphene oxide/aluminium doped zinc oxide nanocomposite for the next generation solar cell applications
    Bu, Ian Y. Y.
    [J]. OPTICAL MATERIALS, 2013, 36 (02) : 299 - 303
  • [6] Crack opening profiles of indentation cracks in normal and anomalous glasses
    Burghard, Z
    Zimmermann, A
    Rödel, J
    Aldinger, F
    Lawn, BR
    [J]. ACTA MATERIALIA, 2004, 52 (02) : 293 - 297
  • [7] Synthesis of graphene-ZnO nanorod nanocomposites with improved photoactivity and anti-photocorrosion
    Chen, Zhang
    Zhang, Nan
    Xu, Yi-Jun
    [J]. CRYSTENGCOMM, 2013, 15 (15): : 3022 - 3030
  • [8] Chicot D., 2010, Mechanical Properties of Ceramic by Indentation: Principle and Applications, Ceramic Materials
  • [9] Coleman VA, 2006, ZINC OXIDE BULK, THIN FILMS AND NANOSTRUCTURES: PROCESSING, PROPERTIES AND APPLICATIONS, P1, DOI 10.1016/B978-008044722-3/50001-4
  • [10] Crack tip fracture toughness of base glasses for dental restoration glass-ceramics using crack opening displacements
    Deubener, J.
    Hoeland, M.
    Hoeland, W.
    Janakiraman, N.
    Rheinberger, V. M.
    [J]. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS, 2011, 4 (07) : 1291 - 1298
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