以Yb2O3粉末和溶胶-凝胶法制备的活性SiO2凝胶为原料,在1550℃保温4h合成了具有单斜结构的单相Yb2Si2O7粉体.采用无压烧结方法获得了Yb2Si2O7陶瓷.通过添加Y2O3烧结助剂,获得了气孔率为3.2％的致密Yb2Si2O7陶瓷.采用XRD、SEM方法对烧结体的结构、成分和形貌进行测试与表征.结果表明:烧结体均为单相的Yb2Si2O7,不含其它杂质相.Y2O3的添加大大降低了烧结体的气孔率,促进了烧结的致密化.所得致密Yb2Si2O7陶瓷的平均晶粒尺寸为1～2 μm,大部分晶粒为颗粒状晶粒.
参考文献
| [1] | Rendtel A.;Herrmann M.;Schubert C.;Hubner H. .Silicon nitride/silicon carbide nanocomposite materials: II, hot strength, creep, and oxidation resistance[J].Journal of the American Ceramic Society,1998(5):1109-1120. |
| [2] | 于方丽,白宇,杜军,王欢锐,杨建锋.多孔氮化硅陶瓷的微观结构、力学性能和气体透气性的研究[J].人工晶体学报,2012(03):656-660. |
| [3] | 罗绍华,张溪溪,侯瑞,陈宇红,耿桂宏.晶硅切割废粉为原料的反应烧结Si3N4结合SiC复相陶瓷的工艺研究[J].人工晶体学报,2013(08):1668-1672. |
| [4] | Smialek JL.;Opila EJ.;Fox DS.;Jacobson NS.;Robinson RC. .SiC and Si3N4 recession due to SiO2 scale volatility under combustor conditions[J].Advanced Composite Materials: The Official Journal of the Japan Society of Composite Materials,1999(1):33-45. |
| [5] | N. Maier;K.G. Nickel;G. Rixecker .High temperature water vapour corrosion of rare earth disilicates (Y,Yb,Lu)_2Si_2O_7 in the presence of Al(OH)_3 impurities[J].Journal of the European Ceramic Society,2007(7):2705-2713. |
| [6] | Shunkichi Ueno;Tatsuki Ohji;Hua-Tay Lin .Recession behavior of Yb_2Si_2O_7 phase under high speed steam jet at high temperatures[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2008(1):178-182. |
| [7] | Su YF;Lee WY .Synthesis of silicate coating by layer-by-layer self-assembly of Yb2O3 and SiO2 particles[J].Surface & Coatings Technology,2008(15):3661-3668. |
| [8] | Jayaseelan DD.;Ueno S.;Ohji T.;Kanzaki S. .Sol-gel synthesis and coating of nanocrystalline Lu2Si2O7 on Si3N4 substrate[J].Materials Chemistry and Physics,2004(1):192-195. |
| [9] | Shunkichi Ueno;Tatsuki Ohji;Hua-Tay Lin .Recession behavior of a silicon nitride with multi-layered environmental barrier coating system[J].CERAMICS INTERNATIONAL,2007(5):859-862. |
| [10] | Yiguang Wang;Jinling Liu .First-principles investigation on the corrosion resistance of rare earth disilicates in water vapor[J].Journal of the European Ceramic Society,2009(11):2163-2167. |
| [11] | Cen Zhao;Feng Wang;Yinjie Sun .Synthesis and characterization of β-Yb_2Si_2O_7 powders[J].CERAMICS INTERNATIONAL,2013(5):5805-5811. |
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%