氧化铈 氧化钇复合材料的制备与性能.pdfVIP

Material Sciences 材料科学, 2017, 7(1), 114-123 Published Online January 2017 in Hans. /journal/ms /10.12677/ms.2017.71015 Fabrication of Ceria/Yttria Composites and Its Properties * Chengwan Cui, Dexin Zhang, Danbin Jia, Wenbin Dai , Jingkun Yu School of Metallurgy, Northeastern University, Shenyang Liaoning th th nd Received: Jan. 5 , 2017; accepted: Jan. 19 , 2017; published: Jan. 22 , 2017 Copyright © 2017 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Open Access Abstract In this paper, the effect of cerium oxide addition and sintering system on the microstructure, phase composition and mechanical properties of cerium oxide/yttrium oxide composites was in- vestigated. The results showed that a small amount of cerium oxide could effectively promote the sintering condition of cerium oxide/yttrium oxide composites and prevent the growth of grain. Meantime, the smallest grain size occurred and the density was higher when the cerium oxide content was 9.1 mol%. With the increase of ceria oxide content, the density of the sample did not change significantly, but the grain size became larger. It is also found that the sintering tempera- ture has great influence on composite materials. The relative density of samples differs from about 60% to 97% when heating temperature increases from 1400˚Cto 1600˚C. And when cerium oxide addition is less than 33.3 mol%, the hardness and fracture toughness of CeO /Y O compo-