Detail publikačního výsledku

Rapid Grain Growth in 3Y-TZP Nanoceramics by Pressure-Assisted and Pressure-Less SPS

SALAMON, D.; KALOUSEK, R.; MACA, K.; SHEN, Z.

Originální název

Rapid Grain Growth in 3Y-TZP Nanoceramics by Pressure-Assisted and Pressure-Less SPS

Anglický název

Rapid Grain Growth in 3Y-TZP Nanoceramics by Pressure-Assisted and Pressure-Less SPS

Druh

Článek WoS

Originální abstrakt

Pressure-less spark plasma sintering (SPS) is a new approach during which rapid densification of ceramic nanopowder green bodies is accompanied by rapid grain growth. Although the origin of this phenomenon has not yet been fully understood significant, difference in grain growth between pressure-less and pressure-assisted SPS was expected. In this work 3Y-TZP nanopowder with average particle size of 12 nm was consolidated using two-step approach: (1) at an intermediate temperature (600°C to 1000°C) SPS warm pressing followed by (2) high temperature (1400°C to 1600°C) pressure-less SPS. The standard one step pressure-assisted SPS experiments were quoted as references. Rapid grain growth was observed during both pressure-less and standard SPS. The samples prepared by both approaches at the same sintering temperature (1400°C–1600°C) achieved identical grain size and grain size distribution, if large pores were eliminated in early stage by SPS warm pressing. The electric current, electromagnetic field, and mechanical pressure is proven to have a negligible direct influence on grain growth in 3Y-TZP ceramics at temperatures. above 1000°C under standard SPS conditions.

Anglický abstrakt

Pressure-less spark plasma sintering (SPS) is a new approach during which rapid densification of ceramic nanopowder green bodies is accompanied by rapid grain growth. Although the origin of this phenomenon has not yet been fully understood significant, difference in grain growth between pressure-less and pressure-assisted SPS was expected. In this work 3Y-TZP nanopowder with average particle size of 12 nm was consolidated using two-step approach: (1) at an intermediate temperature (600°C to 1000°C) SPS warm pressing followed by (2) high temperature (1400°C to 1600°C) pressure-less SPS. The standard one step pressure-assisted SPS experiments were quoted as references. Rapid grain growth was observed during both pressure-less and standard SPS. The samples prepared by both approaches at the same sintering temperature (1400°C–1600°C) achieved identical grain size and grain size distribution, if large pores were eliminated in early stage by SPS warm pressing. The electric current, electromagnetic field, and mechanical pressure is proven to have a negligible direct influence on grain growth in 3Y-TZP ceramics at temperatures. above 1000°C under standard SPS conditions.

Klíčová slova

Particle size; Spark plasma sintering; Zirconia

Klíčová slova v angličtině

Particle size; Spark plasma sintering; Zirconia

Autoři

SALAMON, D.; KALOUSEK, R.; MACA, K.; SHEN, Z.

Rok RIV

2016

Vydáno

01.12.2015

ISSN

0002-7820

Periodikum

JOURNAL OF THE AMERICAN CERAMIC SOCIETY

Svazek

98

Číslo

12

Stát

Spojené státy americké

Strany od

3706

Strany do

3712

Strany počet

7

BibTex

@article{BUT120145,
  author="David {Salamon} and Radek {Kalousek} and Karel {Maca} and Zhijian {Shen}",
  title="Rapid Grain Growth in 3Y-TZP Nanoceramics by Pressure-Assisted and Pressure-Less SPS",
  journal="JOURNAL OF THE AMERICAN CERAMIC SOCIETY",
  year="2015",
  volume="98",
  number="12",
  pages="3706--3712",
  doi="10.1111/jace.13837",
  issn="0002-7820"
}