高熵非氧化物陶瓷的合成与表征开题报告

 2021-08-14 01:08

1. 研究目的与意义(文献综述)

目的:

晶粒大小和晶界是影响多晶陶瓷材料性能的二个重要方面,在本研究中探索一种多相共晶的高熵陶瓷的制备方法,以机械冶金或硝酸盐分解工艺制备多种非氧化物复合粉或高熵合金粉原料,然后采用快速高温原位烧结与合成的方法制备上述材料的共晶陶瓷,采用现代材料测试技术对制备过程中的产物结构进行分析,探索上述材料结构在制备过程中的演化规律,为新材料设计及其制备技术的开发提供基础。

本次实验将基于zrc设计六元碳化物组分,基于快速和机械球磨的陶瓷制备方法,选择合适工艺参数,进行高熵陶瓷的探索式制备,并对产物的性能进行表征。探索高熵陶瓷的合成条件,研究高熵陶瓷的特殊结构和性能。

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2. 研究的基本内容与方案

基本内容:

  1. 基于原子半径尺寸差确定原料和配比,拟采用等摩尔的比例进行陶瓷粉体的制备;
  2. 分别采用快速烧结技术、球磨技术进行高熵陶瓷的制备。
  3. 对制备产物进行sem、tem检测,检验是否制得高熵陶瓷;
  4. 如果没有制得高熵陶瓷,总结可能存在的问题;如果制得高熵陶瓷,进一步对其进行性能的表征检测。

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3. 研究计划与安排

第1-3周:查阅相关文献资料,完成英文翻译。明确研究内容,了解研究所需原料、仪器和设备。确定技术方案,并完成开题报告。

第4-7周:按照设计方案,制备六主元碳化物系列高熵陶瓷。

第8周:采用xrd、sem、tem等测试技术对材料的物相、显微结构进行测试。

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4. 参考文献(12篇以上)

[1]M.G. Poletti, S. Branz, G. Fiore, B.A. Szost, W.A. Crichton, L. Battezzati, Equilibrium high entropy phases in X-NbTaTiZr (X = Al,V,Cr and Sn) multiprincipal component alloys, Journal of Alloys and Compounds, 655(2016) 138-146.[2] H. Chen, A. Kauffmann, B. Gorr, D. Schliephake, C. Seemüller, J.N. Wagner, H.-J.Christ, M. Heilmaier, Microstructure and mechanical properties at elevated temperatures of a new Al-containing refractory high-entropy alloy Nb-Mo-Cr-Ti-Al, Journal of Alloys and Compounds,661(2016) 206-215.[3]S. Praveen, Joysurya Basu, Sanjay Kashyap, Ravi Sankar Kottada, Exceptional resistance to grain growth in nanocrystalline CoCrFeNi high entropy alloy at high homologous temperatures, Journal of Alloys and Compounds, 662(2016) 361-367.[4]G. Dan Sathiaraj, P.P. Bhattacharjee, Analysis of microstructure and microtexture during grain growth in low stacking fault energy equiatomic CoCrFeMnNi high entropy and Ni–60 wt.%Co alloys, Journal of Alloys and Compounds,637(2015) 267-276.[5] G. Laplanche, O. Horst, F. Otto, G. Eggeler, E.P. George, Microstructural evolution of a CoCrFeMnNi high-entropy alloy after swaging and annealing, Journal of Alloys and Compounds, 647(2015) 548-557.[6] E. Bichaud, J.M. Chaix, C. Carry, M. Kleitz, M.C. Steil, Flash sintering incubation in Al2O3/TZP composites, Journal of the European Ceramic Society, 35 (2015) 2587-2592.[7] Yuanyao Zhang, Jian Luo, Promoting the flash sintering of ZnO in reduced atmospheres to achieve nearly full densities at furnace temperatures of lt;120 °C, Scripta Materialia, 106 (2015) 26-29[8] Dianguang Liu, Yan Gao, Jinling Liu, Fangzhou Liu, Kai Li, Haijun Su, Yiguang Wang, Linan An, Preparation of Al2O3–Y3Al5O12–ZrO2 eutectic ceramic by flash sintering, Scripta Materialia, 114 (2016) 108-111.[9] Zhang Y, Yang X, Liaw PK. Alloy design and properties optimization of high-entropy alloys. JOM 2012:64(7):830–8.[10] Zhang Y, Zuo TT, Liaw PK, Cheng YQ. High-entropy alloys with high saturation magnetization and electrical resistivity.Scientific Reports 2013;3:1455.[11] Yang X, Zhang Y, Liaw PK. Microstructure and compressive properties of TiZrNbMoVx high-entropy alloys. Proc Eng 2012:292–8.[12] Singh S, Wanderka N, Murty BS, Glatzel U, Banhart J. Decomposition in multi-component AlCoCrCuFeNi high-entropy alloy. Acta Mater 2011;59:182–90.[13] Zhang H, Pan Y, He Y, Jiao H. Microstructure and properties of 6FeNiCoSiCrAlTi high-entropy alloy coating. Appl Surf Sci 2011;257(6):2259–63.[14] Ma D, Tan H, Zhang Y, Li Y. Correlation between glass formation and type of eutectic coupled zone in eutectic alloys. Mater Trans 2003;44(10):2007–10.[15] Zhang Y, Zhou YJ, Lin JP, Chen GL, Liaw PK. Solid-solution phase formation rules for multi-component alloys. Adv Eng Mater 2008;10(6):534–8.

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