采用化学沉淀法制备了热障涂层用Nd2Zr2O7(NZ)以及CeO2-Nd2O3-ZrO2(NCZ)陶瓷粉末.通过电感耦合等离子体原子发射光谱(ICP-AES),X射线衍射、DSC及霍尔流速计对粉末化学组成、相组成,高温相稳定性和流动性能进行了研究.通过高温膨胀仪、DSC和激光热导仪分别测定其热膨胀系数和导热系数.结果表明,掺杂的NCZ粉末保持了NZ的烧绿石相结构, 120℃时粉末为无定形的混合氧化物,900℃时转化为复合氧化物,1200℃时转变为单一的锆酸钕烧绿石相;高温下NCZ无明显相变;在高于1400℃的温度下煅烧后,NCZ的流动性得到显著改善;添加CeO2可提高锆酸钕的热膨胀系数,而对其导热系数和比热系数的影响不大.
参考文献
| [1] | Uwe S,Christoph L,Klaus F.Aerospace Science and Technology,2003,7(1):73-80. |
| [2] | Chwa S O,Ohmori A.Surf.Coat.Technol.,2002,153(2-3):304-312. |
| [3] | Brandon J R,Taylor R.Surf Coat.Technol,,1991,46(1):91-101. |
| [4] | Wu J,Wei X Z,Padture N P,et al.J Am.Ceram.Soc.,2002,85(12):3031-3036. |
| [5] | Dietrich M,Vassen R,Stover D.Ceram.Eng.Sci.Proc.,2003,24(3):637-643. |
| [6] | David R C.Surf.Coat.Technol.,2003,163-164(1):67-74. |
| [7] | Lutique S,Javorsky P,Konings R J M,et al.Chem.Thermodynamics,2003,35:955-965. |
| [8] | Lahmann H,Pitzer D.J,.Am.Ceram.Soc.,2003,86(8):1338-1344. |
| [9] | Dai Hui,Zhong Xinghua,Li Jiayan,et al.Surf.Coat.Technol.,,2006,201(6):2527-2533. |
| [10] | David R C,Simon R P.Materials Today,2005,8(6):22-29. |
| [11] | Zhou Hongming,Yi Danqing,Yu Zhiming,et al.Journal of Alloys and Compounds,2007,438(1-2):217-221. |
| [12] | 李报厚,张登君,张冠东(LI Bao-hou,et al).化工冶金(Engineering Chemistry & Metallurgy),1997,18(2):97-101. |
| [13] | Subramanian A,Aravamudan G,Subba Rao G V.Prog.Sold State Chem.,1983,15:55-58. |
| [14] | Mandal B P,Tyag A K.Materials Science and Engineering B,2007,136(1):46-49. |
| [15] | 刘喜华,毛红,宋波(LIU Xi-hua,et al).北京科技大学学报(Journal of University of Science and Technology Beijing),2004,26(4):404-406. |
| [16] | Xu Qiang,Pan Wei,Wang Jingdong,et al.Materials Letters,2005,59(22):2804-2807. |
| [17] | 吴清仁,文壁璇(WU Qing-ren,et al).华南理工大学学报(自然科学版)(Journal of South China University of Technology(Natural Science)),1996,24(3):11-15. |
| [18] | 奚同庚.无机材料热物性学.上海:上海科学技术出版社,1981. |
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