Micro-scale Testing to Evaluate the Fracture Characteristics of Quasi-brittle Materials
In this paper micro-scale testing techniques have been implemented on two types of quasi-brittle material: pile grade A (PGA) graphite and air-plasma sprayed yttria (7 wt.%) stabilized zirconia (APS-YSZ).One approach uses a force measurement system within a FEI Helios Dualbeam FIB/SEM workstation,which allows the fracture characteristics and mechanical properties of the two materials to be evaluated and correlated with local microstructural features.In addition for PGA graphite,disc-compression and trench-probe methods have been applied.Hence the initiation,propagation of the cracks and the corresponding deformation can be recorded and investigated.For the APS-YSZ,micro-scale cantilevers have been fabricated using FIB and a load-recording probe has been applied in-situ.The fracture toughness,flexural strength and the cracking path are analysed.Interpretation of these tests has contributed to the understanding of the macro-scale quasi-brittle mechanical behaviour of the two materials.
Pile grade A graphite Air-plasma-sprayed yttria stabilized zirconia Disc compression Micro-scale cantilever testing
Dong Liu Peter Heard Peter E J Flewitt
Interface Analysis Centre,University of Bristol,Bristol,BS2 8BS,UK;Department of Mechanical Engineer Interface Analysis Centre,University of Bristol,Bristol,BS2 8BS,UK Interface Analysis Centre,University of Bristol,Bristol,BS2 8BS,UK;School of Physics,HH Wills Labora
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）