Publication detail
Preparation of Transparent Nanoceramics by Suppressing Pore Coalescence
XIONG, Y. HU, J. SHEN, Z. POUCHLÝ, V. MACA, K.
Czech title
Příprava transparentní nanokeramiky potlačením koalescence pórů
English title
Preparation of Transparent Nanoceramics by Suppressing Pore Coalescence
Type
journal article in Web of Science
Language
en
Original abstract
Microstructural developments in nanoceramics were investigated in 3Y-TZP compacts with relative density (RD) exceeding 93%. Special attentions were paid to the evolutions of pore structures. It was found that the densification process of nanoceramic compacts with apparently close porosity was greatly jeopardized by pore coalescence. This observation was interpreted by the coalescence of locally interconnected pores originated from inhomogeneous packing of particles. The pore coalescence can be suppressed by application of an external pressure. The processing principle was demonstrated by spark plasma sintering (SPS) with extended holding at a minimized sintering temperature. The highly dense 3Y-TZP nanoceramics containing no large pores became optically transparent
Czech abstract
Byl studován vývoj mikrostruktury 3Y-TZP nanokeramiky s relativní hustotou větší než 93%. Speciální pozornost byla věnovány vývoji struktury pórů. Bylo zjištěno, že zhutňování nanokeramiky s uzavřenou pórovitostí bylo urychleno koalescencí pórů. To bylo vysvětleno koalescencí lokálně propojených pórů vzniklých z nehomogenit v tělese. Koalescenci pórů bylo možno potlačit aplikováním externího tlaku. Tento proces byl demonstrován pomocí aplikace Spark Plasma Sintering za použití nízkých teplot a dlouhých časů, což vedlo k získání optické transparence vzorků.
English abstract
Microstructural developments in nanoceramics were investigated in 3Y-TZP compacts with relative density (RD) exceeding 93%. Special attentions were paid to the evolutions of pore structures. It was found that the densification process of nanoceramic compacts with apparently close porosity was greatly jeopardized by pore coalescence. This observation was interpreted by the coalescence of locally interconnected pores originated from inhomogeneous packing of particles. The pore coalescence can be suppressed by application of an external pressure. The processing principle was demonstrated by spark plasma sintering (SPS) with extended holding at a minimized sintering temperature. The highly dense 3Y-TZP nanoceramics containing no large pores became optically transparent
Keywords in Czech
nanokeramika, ZrO2, SPS
Keywords in English
nanoceramics, zirconia, spark plasma sintering
RIV year
2011
Released
01.11.2011
Publisher
WILEY-BLACKWELL
Location
COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA, USA
ISSN
0002-7820
Volume
94
Number
12
Pages from–to
4269–4273
Pages count
5
BIBTEX
@article{BUT89661,
author="Yan {Xiong} and Jianfeng {Hu} and Zhijian {Shen} and Václav {Pouchlý} and Karel {Maca},
title="Preparation of Transparent Nanoceramics by Suppressing Pore Coalescence",
year="2011",
volume="94",
number="12",
month="November",
pages="4269--4273",
publisher="WILEY-BLACKWELL",
address="COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA, USA",
issn="0002-7820"
}