标题：Mechanical Properties of Boron Nitride Nanosheets (BNNSs) Reinforced Si3N4 Composites
作者：Liang, Guandong ;Bi, Jianqiang ;Sun, Guoxun ;Chen, Yafei ;Wang, Weili
作者机构：[Liang, Guandong ;Bi, Jianqiang ;Sun, Guoxun ;Chen, Yafei ;Wang, Weili ] Key Laboratory for Liquid–Solid Structure Evolution and Processing of M 更多
会议名称：Symposium on Advances in Powder and Ceramic Material Science held at the 149th Annual Meeting and Exhibition, TMS 2020
会议日期：February 23, 2020 - February 27, 2020
来源：Minerals, Metals and Materials Series
摘要：The boron nitride nanosheets (BNNSs)/silicon nitride (Si3N4) composite ceramics were prepared by SPS sintering. BNNSs with few layers and transverse size in micron-scale were prepared by ball-milling and ultrasound-assisted liquid-phase stripping. In this work, it was found that the BNNSs prepared by these two methods could enhance the mechanical properties of silicon nitride ceramics, and of BNNSs/Si3N4 composite ceramics exhibit better bending strength when adding the ultrasound-assisted liquid-phase stripping BNNSs. The bending strength and fracture toughness of BNNSs/Si3N4 composite ceramics was increased by 36% and 51%, respectively, when 2 wt% BNNSs prepared by ball-milling method were added. The pullout of BNNSs, the bridging of cracks, and the deflection of cracks are the main factors of improving the toughness.
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