硅酸盐学报2017，Vol.45Issue(6)：841-846,6.DOI:10.14062/j.issn.0454-5648.2017.06.14
六面顶低温超高压烧结制备SiC-Al2O3-Y2O3陶瓷
SiC-Al2O3-Y2O3 Ceramic Sintered by Hinge-Type Cubic-Anvil Press Method at Low Temperature and Ultrahigh Pressure
摘要
Abstract
High density SiC ceramic was fabricated with pure SiC micro- and nano-powders in a hinge-type cubic-anvil press method at 4.5GPa and 1250℃ for an optimum heat-preserving time of 6 min. SiC ceramic was sinterred at a ultrahigh pressure and different amounts of Al2O3, Y2O3(0-15%in mass fraction) as sintering aids. The samples were characterized by X-ray diffraction, field emission electron microscopy, X-ray energy spectroscopy, micro-hardness and density tests, respectively. The result shows that the Al2O3and Y2O3 are effective in low-temperature sintering. At a low temperature and a ultrahigh pressure, SiC ceramic can appear a phase of Al2Y4O9. The relative density of sample sintered with Al2O3of 7.5% and Y2O3of 7.5% at 4.5GPa and 1250℃ for 6 min is 99.9%, and the micro-hardness can reach HV9.802570.关键词
六面顶技术/超高压烧结/氧化铝/氧化钇/微纳米碳化硅Key words
hinge-type cubic-anvil press technology/ultra-high pressure sintering/alumina/yttrium oxide/micro-nano silicon carbide分类
通用工业技术引用本文复制引用
铁健,柳馨,铁生年..六面顶低温超高压烧结制备SiC-Al2O3-Y2O3陶瓷[J].硅酸盐学报,2017,45(6):841-846,6.基金项目
青海省重点实验室发展专项资金(2015-Z-Y02). （2015-Z-Y02）
