Recycling process for yttria-stabilized tetragonal zirconia ceramics using a hydrothermal treatment

被引：20

作者：

Kamiya, Masahiro ^{[1
]}

Mori, Yasuki ^{[1
]}

Kojima, Takashi ^{[2
]}

Sasai, Ryo ^{[1
]}

Itoh, Hideaki ^{[1
]}

机构：

[1] Nagoya Univ, EcoTopia Sci inst, Div Environm Res, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Chiba Univ, Fac Engn, Dept Appl Chem, Chiba 260, Japan

来源：

JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT | 2007年 / 9卷 / 01期

关键词：

recycling; zirconia ceramics; hydrothermal treatment;

D O I：

10.1007/s10163-006-0168-3

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The recycling process for 3 mol% yttria-stabilized tetragonal zirconia polycrystals (3Y-TZP) sintered at 1450 degrees-1550 degrees C was examined by applying low-temperature degradation of zirconia ceramics under hydrothermal conditions. Hydrothermal treatment at a temperature from 200 degrees to 240 degrees C can lead to the spontaneous disintegration of 3Y-TZP sintered bodies into powdery particles. The hydrothermally obtained zirconia powder was found to consist of primary particles and aggregated particles. Detailed X-ray diffraction measurement revealed the formation of a cubic zirconia phase in the 3Y-TZP sintered bodies, which seemed to inhibit the disintegration of aggregated particles toward the primary particle level. The reclaimed 3Y-TZP powder was sintered again through a conventional powder processing route. The mechanical properties and microstructure of recycled 3Y-TZP sintered specimens were examined by comparison with those of the original 3Y-TZP sintered bodies. Dense recycled 3Y-TZP sintered at a higher temperature exhibited higher fracture toughness to some degree than the original 3Y-TZP.

引用

页码：27 / 33

页数：7