标题：Mechanical Properties of Boron Nitride Nanosheets (BNNSs) Reinforced Si3N4 Composites
作者：Liang G.; Bi J.; Sun G.; Chen Y.; Wang W.
作者机构：[Liang, G] Key Laboratory for Liquid–Solid Structure Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061 更多
通讯作者地址：[Bi, J] Key Laboratory for Liquid–Solid Structure Evolution and Processing of Materials, Ministry of Education, Shandong UniversityChina;
来源：Minerals, Metals and Materials Series
关键词：BNNSs/Si3N4 composite ceramics; Boron nitride nanosheets; Mechanical properties
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. © 2020, The Minerals, Metals & Materials Society.