Effect of pretreatment process of B4C powder on the surface properties and freeze-cast porous ceramics
Effect of pretreatment process of B4C powder on the surface properties and freeze-cast porous ceramics
复制标题
B4C粉末预处理工艺对表面性能及冻铸多孔陶瓷的影响
DOI：
10.1016/j.matchemphys.2020.123209
复制
发表时间：
2020-09
影响因子：
4.6
通讯作者：
Feng Ye
中科院分区：
文献类型：
--
作者：
Yang Wang;Qiang Liu;Biao Zhang;Junjie Ding;Haoqian Zhang;Yicheng Jin;Zhaoxin Zhong;Wen Wang;Feng Ye
B4 C粉末表面存在的氧化硼和杂质不利于绿色坯体的烧结，极大地限制了其应用。在此，我们采用三种粉末预处理方法，包括在酸溶液中，碱溶液和乙醇溶液中的洗衣粉，以解决这个问题。研究了所制备的具有单向排列孔道的B4C多孔陶瓷的烧结性能、气孔形貌、显微结构和力学性能。粉末预处理有助于去除硼氧化物和杂质，加速多孔陶瓷的致密化过程。降低的孔隙率、波长和片层厚度以及高孔隙连通性是增强的机械性能的主要原因，特别是在垂直于凝固的方向上。通过比较，确定了酸溶液净化法为粉体预处理的最佳工艺。研究证实，对B4C粉末进行预处理，是去除B4C粉末中的氧化硼和杂质，提高材料性能，从而拓宽材料应用范围的关键。
The boron oxide and impurities existing on the surface of B4C powder are detrimental to the sintering of the green body, greatly limiting its application. Here, we utilize three powder pretreatment methods, including washing powder in acid solution, alkali solution and ethanol solution, to solve this problem. Furthermore, the produced freeze-cast porous B4C ceramics with unidirectionally aligned pore channels are studied in terms of the sinterability, pore morphology, microstructure and mechanical properties. The powder pretreatments contribute to the remove of boron oxide and impurities as well as the acceleration of densification process of the porous ceramics. The decreased porosity, wavelength and lamellar thickness, and high pore connectivity are the main reasons for the enhanced mechanical properties especially in the direction perpendicular to the freezing. By comparison, the purification with acid solution is established as the optimal technique for powder pretreatment. The research confirms that the pretreatment of B4C powder is essential for the removal of boron oxide and impurities to improve performance, thereby widening the application scopes of materials.
登录
查看更多内容
新型室温冷冻铸造制备超高孔隙率氧化锆陶瓷
影响因子：
6
作者：
Zhang, Xinghong;Han, Jiecai;Du, Jiancong;Han, Wenbo;Hong, Changqing
通讯作者：
Hong, Changqing
影响因子：
6
作者：
Zhihui Zhang;T. Topping;Y. Li;R. Vogt;Yizhang Zhou;Christopher D. Haines;J. Paras;D. Kapoor
通讯作者：
Zhihui Zhang;T. Topping;Y. Li;R. Vogt;Yizhang Zhou;Christopher D. Haines;J. Paras;D. Kapoor
DOI：
10.1016/j.msea.2007.09.052
发表时间：
2008-07
影响因子：
6.4
作者：
Ning Zhang;H. Ru;Q. Cai;X. D. Sun
通讯作者：
Ning Zhang;H. Ru;Q. Cai;X. D. Sun
DOI：
10.4028/www.scientific.net/msf.848.279
发表时间：
2016-03
期刊：
Materials Science Forum
影响因子：
--
作者：
W. Liu;Min Wu;Z. Shi;Z. Xu;J. P. Ruan
通讯作者：
W. Liu;Min Wu;Z. Shi;Z. Xu;J. P. Ruan
影响因子：
3.9
作者：
S. Prochazka;S. L. Dole;C. Hejna
通讯作者：
S. Prochazka;S. L. Dole;C. Hejna