MICROSTRUCTURAL CHANGES DURING HOT ISOSTATIC PRESSING OF SINTERED LEAD ZIRCONATE TITANATE.

K. G. Ewsuk, G. L. Messing

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A commercial lead zirconate titanate powder of composition (Pb//0//. //9//4Sr//0//. //0//6) (Zr//0//. //5//3Ti//0//. //4//7)O//3 was used. Macropores in sintered PZT shrink appreciably by a two-stage process during hot isostatic pressing. In the first stage, rapid size reduction occurs via rearrangement and solution-precipitation due to the high concentration of a liquid phase at pore surfaces. The results of high pressure HIP experiments indicate the processing related macropores are responsible for end point densities that are less than theoretical. It is concluded that HIP cannot be used to completely remove large processing related voids. However, with the proper control of powder processing and sintering to avoid the large defects, HIPing can be a viable means of removing residual porosity in sintered ceramics.

Original languageEnglish (US)
Title of host publicationMaterials Science Research
PublisherPlenum Press
Pages609-619
Number of pages11
ISBN (Print)0306416778, 9780306416774
DOIs
StatePublished - 1984

Publication series

NameMaterials Science Research
Volume17
ISSN (Print)0076-5201

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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