Vacuum sintering of plasmochemical powders based on ZrO{sub 2}. 1. Effect of sintering temperature on properties of ceramics

Journal Article · Mon May 01 04:00:00 EDT 1995 · Powder Metallurgy and Metal Ceramics

DOI:https://doi.org/10.1007/BF00559661· OSTI ID:207174

Savchenko, N L; Sablina, T Y; Kul`kov, S N ^[1]

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1. Institute of Physics of Strength and Material Science, Tomsk (Russian Federation)

Powders produced by thermal dissociation of metals dispersed from droplets of salt solutions in the plasma of arc or high-frequency dischage have often a complicated morphology (hollow spheres, flakes). This complicates production from these powders of dense ceramic parts based on ZrO{sub 2} - Y{sub 2}O{sub 3} hardened by martensitic transformation. The main special feature of producing these materials is that at the temperature of conventional sintering in air higher than 1600{degrees}C required for obtaining high density the grains start to grow and this leads to the T{yields}M transformation in cooling which fractures the specimens. It was shown that sintering the plasmochemical zirconia, stabilizes 3% (mol) Y{sub 2}O{sub 3}, in vacuum at 1800{degrees}C makes it possible to avoid destabilizing T-ZrO{sub 2} in cooling and produce a dense and strong material. The aim of this work was to examine the properties based on zirconia, partially stabilized with Y{sub 2}O{sub 3}, after vacuum sintering in a wide temperature range up to 1750{degrees}C.

• Sponsoring Organization: USDOE
• OSTI ID: 207174
• Journal Information: Powder Metallurgy and Metal Ceramics, Journal Name: Powder Metallurgy and Metal Ceramics Journal Issue: 11-12 Vol. 33; ISSN PMMCEF; ISSN 1068-1302
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DENSITY
MECHANICAL PROPERTIES
SINTERING
TEMPERATURE RANGE 0400-1000 K
TEMPERATURE RANGE 1000-4000 K
YTTRIUM OXIDES
ZIRCONIUM OXIDES