Dynamic Compressive Fracture of Ceramic Polymer Layered Composites

被引：2

作者：

Acharya, S. ^{[1
]}

Mukhopadhyay, A. K. ^{[2
]}

机构：

[1] Cent Glass & Ceram Res Inst, CSIR, Nonoxide Ceram & Composite Div, Kolkata 700032, India

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

来源：

STRUCTURAL INTEGRITY | 2014年 / 86卷

关键词：

Alumina; Split Hopkinson Pressure Bar; Deformation; Failure Strength; SILICON-CARBIDE; PLASTICITY; STRENGTH; FAILURE;

D O I：

10.1016/j.proeng.2014.11.039

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dynamic compressive fracture evaluation is an essential characterization technique for advanced monolithic structural ceramics like alumina. Thus, for high strain rate induced damage tolerant applications, it is needed to take care of the characteristically brittle microstructure of the alumina ceramics. Hence, a smarter design concept has been involved based on the idea that cracks can either be arrested or deflected if a weak interface or interphase can be introduced. Thus, ceramic polymer layered composites (CPLC) were fabricated from high (e.g., 97%) density alumina disks pressureless sintered from sub-micron (d(50)-0.6 square m) alumina powder. The dynamic fragmentation of the CPLC samples at a reasonably high e.g., 900. s(-1) strain rate has been studied with the real time, high-speed, in-situ video images, obtained during their failure in SHPB tests. A new failure mechanism has been proposed based on these data and FESEM evidences of grain boundary microcrack, inter/intra-granular shear bands and microfracture/cleavage formation. (C) 2014 The Authors. Published by Elsevier Ltd.

引用

页码：281 / 286

页数：6

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