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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" }