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"
}