Publication detail

Grain growth during capsule-free hot isostatic pressing

SPUSTA, T. PRAJZLER, V. MACA, K.

Original Title

Grain growth during capsule-free hot isostatic pressing

Type

journal article in Web of Science

Language

English

Original Abstract

This paper provides a new insight to the capsule free hot isostatic pressing (HIP) of alumina and yttria-stabilized zirconia ceramics. The first part of the paper focuses on the pre-sintering stage, namely the impact of conventional (2, 5, 10 °C/min) and rapid heating rate (100 °C/min) on pore closure and grain growth. It is shown that the rapid heating neither changes the pore closure behavior nor restricts the grain growth compared to conventional pre-sintering. The second part investigates the influence of temperature, dwell time, and applied pressure on the microstructure development during HIP. Our findings indicate the existence of a kinetic window, providing the optimal HIP conditions (1200–1250 °C, 200 MPa, 1–4 h for investigated powders) for production of almost fully dense compacts with only minimal grain growth. Our results also show that the applied pressure (up to 200 MPa) does not facilitate the grain boundary mobility of the investigated materials even at a higher temperature (1300 °C) at which the grain growth normally occurs. The potential of optimized capsule-free HIP was demonstrated by preparation of a transparent c-YSZ sample by a combination of rapid pre-sintering and optimized post-HIP

Keywords

Aluminum oxide; Grain boundaries; Grain growth; Hot isostatic pressing; Powders; Sintered alumina; Yttria stabilized zirconia; Yttrium oxide

Authors

SPUSTA, T.; PRAJZLER, V.; MACA, K.

Released

15. 9. 2022

ISBN

0272-8842

Periodical

Ceramics International

Year of study

48

Number

18

State

United Kingdom of Great Britain and Northern Ireland

Pages from

25764

Pages to

25771

Pages count

8

URL

https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0272884222018260

BibTex

@article{BUT181634,
  author="Tomáš {Spusta} and Vladimír {Prajzler} and Karel {Maca}",
  title="Grain growth during capsule-free hot isostatic pressing",
  journal="Ceramics International",
  year="2022",
  volume="48",
  number="18",
  pages="25764--25771",
  doi="10.1016/j.ceramint.2022.05.248",
  issn="0272-8842",
  url="https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0272884222018260"
}