使用高温实时观测设备对添加有Al2O3-Y2O3烧结助剂的碳化硅(SiC)陶瓷在烧结过程中的收缩情况进行了观测,获得了液相烧结SiC的收缩曲线;使用TG-DTA-MASS联用技术、原位X射线衍射技术对该SiC陶瓷在液相生成前后的质量损失(失重)情况及其在烧结过程中的物相变化进行了分析.结果表明:SiC表面SiO2的存在降低了Al2O3-Y2O3的共熔温度,使液相在远低于烧结助剂最低共熔温度时就已经生成;液相的生成造成了碳化硅试样的快速失重.
参考文献
| [1] | Jingxian Zhang;Dongliang Jiang;Qingling Lin .Gelcasting and pressureless sintering of silicon carbide ceramics using Al_2O_3-Y_2O_3 as the sintering additives[J].Journal of the European Ceramic Society,2013(10):1695-1699. |
| [2] | Li, D.;Yao, X.;Chen, J.;Jiang, F.;Yang, Y.;Huang, Z.;Liu, X..Microstructure and reaction mechanism of SiC ceramic with mullite-zircon as a new liquid-phase sintering additives system[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2013:510-514. |
| [3] | German, R;Suri, P;Park, S .Review: liquid phase sintering[J].Journal of Materials Science,2009(1):1-39. |
| [4] | CHEN Z M;TAN S H;JIANG D L .In-situ reinforce SiC ceramics[J].Journal of Inorganic Materials,1997,12:195-199. |
| [5] | Hanqin Liang;Xiumin Yao;Xuejian Liu;Zhengren Huang .The effect of powder bed on the liquid phase sintering of α-SiC[J].Materials & design,2014(Apr.):1009-1013. |
| [6] | LIANG H Q;YAO X M;ZHANG H et al.In situ toughening of pressureless liquid phase sintered α-SiC by using TiO2[J].Ceramics International,2014,40:10699-10704. |
| [7] | D. SCITI;A. BELLOSI .Effects of additives on densification, microstructure and properties of liquid-phase sintered silicon carbide[J].Journal of Materials Science,2000(15):3849-3855. |
| [8] | BAUD S;THEVENOT F;CHATILLON C .High temperature sintering of SiC with oxide additives:Ⅱ.Vaporation process in powder beds and gas-phase analysis by mass spectrometry[J].Journal of the European Ceramic Society,2003,23:9-18. |
| [9] | Winn E.Jennifer;Clegg William J. .Role of the Powder Bed in the Densification of Silicon Carbide Sintered with Yttria and Alumina Additives[J].Journal of the American Chemical Society,1999(12):3466-3470. |
| [10] | Tor Grande;Hakon Sommerset;Eirik hagen .Effect of weight loss on liquid-phase-sintered silicon carbide[J].Journal of the American Ceramic Society,1997(4):1047-1052. |
| [11] | KINSMAN K M;MCKITTRICK J;SLUZKY E et al.Phase development and luminescence in chromium-doped Yttrium Aluminum Garnet (YAG:Cr) phosphors[J].Journal of the American Ceramic Society,1994,77:2866-2872. |
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%