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Data on Science Detailed by Researchers at Tosoh Corporation (Nanocrystalline, ultra-degradation-resistant zirconia: its grain boundary nanostructure...

August 15, 2014

Data on Science Detailed by Researchers at Tosoh Corporation (Nanocrystalline, ultra-degradation-resistant zirconia: its grain boundary nanostructure and nanochemistry)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Science have been published. According to news reporting originating from Kanagawa, Japan, by NewsRx correspondents, research stated, "Y2O3-stabilized tetragonal ZrO2 polycrystal (Y-TZP) has been known to be an excellent structural material with high strength and toughness since the pioneering study by Garvie et al. in 1975. However, Y-TZP is not considered an environmental or biomedical material because it undergoes an inherent tetragonal-to-monoclinic (T ? M) phase transformation in humid or aqueous environment, which leads to premature failure, so-called low-temperature degradation (LTD)."

Our news editors obtained a quote from the research from Tosoh Corporation, "In this study, we demonstrate for the first time that this fatal shortcoming of Y-TZP can be resolved by controlling the grain boundary nanostructure and chemical composition distribution in Y-TZP. Nanocrystalline Y-TZP doped with Al(3+) and Ge(4+) ions exhibits no LTD for more than 4 years in hot water at 140 C, whereas 70% of the tetragonal phase in conventional TZP transforms to the monoclinic phase within only 15 h. This innovative Y-TZP can be fabricated by pressureless sintering at 1200 C; far below the sintering temperature for conventional Y-TZP."

According to the news editors, the research concluded: "The developed TZP ceramics will be useful in numerous environmental-proofing applications, particularly in the biomedical engineering field."

For more information on this research see: Nanocrystalline, ultra-degradation-resistant zirconia: its grain boundary nanostructure and nanochemistry. Scientific Reports, 2014;4():4758. (Nature Publishing Group -; Scientific Reports -

The news editors report that additional information may be obtained by contacting K. Matsui, Tokyo Research Laboratory, Tosoh Corporation, 2743-1, Hayakawa, Ayase, Kanagawa 252-1123, Japan. Additional authors for this research include H. Yoshida and Y. Ikuhara (see also Science).

Keywords for this news article include: Asia, Japan, Science, Kanagawa.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

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Source: Science Letter

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