研究了3种稀土氧化物对氧化铝陶瓷烧结性能和力学性能的影响.结果表明: 含Y2O3,La2O3,Sm2O3的添加剂促进了氧化铝瓷的烧结,提高了氧化铝瓷的力学性能.Y2O3和Sm2O3掺量为0.50%,La2O3掺量为0.75%时氧化铝瓷在1600或1620 ℃保温2 h烧结,相对密度达98.9%以上,强度超过439 MPa,断裂韧性达5.15 MPa·m1/2以上.微观结构分析表明,Y2O3,La2O3,Sm2O3抑止氧化铝晶粒生长,细化晶粒,使晶粒尺寸较均匀形成致密化结构.
参考文献
| [1] | 薄占满;贺宏胜 .低温烧结细晶氧化铝瓷的研究[J].硅酸盐学报,1995,23(03):9. |
| [2] | Powell Dogan C A;Heuer A H .Microstructure of 96% alumina ceramics-Ⅱ Crystallization of high-magnesia boundary glasses[J].Journal of the American Ceramic Society,1990,73(12):3677. |
| [3] | Yasuoka M.;Brito ME.;Kanzaki S.;Hirao K. .HIGH-STRENGTH AND HIGH-FRACTURE-TOUGHNESS CERAMICS IN THE AL2O3/LAAL11O18 SYSTEMS[J].Journal of the American Ceramic Society,1995(7):1853-1856. |
| [4] | 穆柏春,孙旭东.稀土对Al2O3陶瓷烧结温度、显微组织和力学性能的影响[J].中国稀土学报,2002(z2):104-107. |
| [5] | 邱关明.掺钇磁盘玻璃基板的研究[J].中国稀土学报,2004(01):89-93. |
| [6] | Mark Thompson A;Soni Kamal K;Chan Helen M et al.Dopant distribution in rare-earth-doped alumina[J].Journal of the American Ceramic Society,1997,4(02):373. |
| [7] | Fang Jinxin;Mark Thompson A;Harmer Martin P et al.Effect of yttrium and lanthanum on the final-stage sintering behavior of ultrahigh-purity alumina[J].Journal of the American Ceramic Society,1997,8(08):2005. |
| [8] | Levin E M;Robbins C R;MoMurdie H T.Phase Diagrams for Ceramic[M].The American Ceramic Society,1964 |
| [9] | 刘维跃;辛玉军;李红岩 .La2O3对ZTM陶瓷晶界性能的影响[J].材料研究学报,1996,10(01):68. |
| [10] | Loudjani M K .Yttrium diffusion in α-alumina single crystal[J].Journal of the European Ceramic Society,1998,18:591. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%