Boron carbide nanoparticles for high-hardness ceramics: Crystal lattice defects after treatment in a planetary ball mill

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• 作者：Mikhail Annenkov^a ; ^b ; Vladimir Blank^a ; ^b ; ^c ; Boris Kulnitskiy^a ; ^b ; ^{boris@tisnum.ru} ; Konstantin Larionov^a ; ^b ; Danila Ovsyannikov^a ; Igor Perezhogin^a ; ^b ; ^d ; Mikhail Popov^a ; ^b ; ^c ; Pavel Sorokin^a ; ^b ; ^c
• 关键词：Boron carbide ; Planetary mill ; Transmission electron microscopy ; Crystal lattice defects ; Cracks
• 刊名：Journal of the European Ceramic Society
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：37
• 期：4
• 页码：1349-1353
• 全文大小：1846 K
• 卷排序：37

文摘

Deformation features of the boron carbide lattice treated in a planetary ball mill are studied in our work. It is shown that such treatment causes a decrease in the B4C grain size and cracking along the {202¯1}h planes, whereas the same treatment in the presence of silicon results in the appearance of twins along the {101¯1}h planes. Distorted stacking faults along (101¯4)h are observed. Ab initio   simulations shown, that among low-index crystallographic planes {202¯1}h and {101¯1}h have the smallest values of specific surface energy which favors the formation of defects and cracks.