Si_(3)N_(4)nanowires@pyrolytic carbon nanolayers coupled withhydroxyapatite nanosheets as reinforcement for carbon matrixcomposites with boosting mechanical and friction properties  

作　　者：Lina Sun Leilei Zhang Xuemin Yin Yeye Liu Yao Guo Hongchao Sheng Xianghui Hou 

机构地区：[1]State Key Laboratory of Solidification Processing,Shaanxi Key Laboratory of Fiber Reinforced Light Composite Materials,Northwestern PolytechnicalUniversity,Xi'an,710072,China [2]Department of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang,212003,China [3]Faculty of Engineering,The University of Nottingham,University Park,Nottingham,NG72RD,United Kingdom

出　　处：《Journal of Materiomics》2023年第1期197-205,共9页无机材料学学报（英文）

基　　金：his work was supported by the National Natural Science Foundation of China under Grant Nos.51872232;the Research Fund of the State Key Laboratory of Solidification Processing(NWPU),China(Grant No.136-QP-2015),the“111”project of China(B08040);the National Training Program of Innovation and Entrepreneurship for Undergraduates(Grand No.S202010699336);Project supported by the Joint Funds of the National Natural Science Foundation of China(Grant No.U21B2067).

摘　　要：Extensive attention has been drawn to the development of carbon-matrix composites for application in the aerospace and military industry,where a combination of high mechanical strength and excellent frictional properties are required.Herein,carbon-matrix composites reinforced by Si_(3)N_(4)nanowires@pyrolytic carbon nanolayers(Si_(3)N_(4nws)@PyCnls)coupled with hydroxyapatite nanosheets is reported.The Si_(3)N_(4nws)@PyCnls(SP)with coaxial structure could increase the surface roughness of Si_(3)N_(4nws)and promote the stress transfer to the carbon matrix,whereas the porous hydroxyapatite nanosheets favor the infiltration of the carbon matrix and promote the interfacial bonding between the SP and carbon matrix.The carbon matrix composites reinforced by SP coupled with hydroxyapatite nanosheets(Si_(3)N_(4nws)@PyCnls-HA-C)exhibit excellent mechanical strength.Compare with the conventional Si_(3)N_(4nws)reinforced carbon composites,Si_(3)N_(4nws)@PyCnls-HA-C(SPHC)have 162%and 249%improvement in flexural strength and elastic modulus,respectively.Moreover,the friction coefficient and wear rate decreased by 53%and 23%,respectively.This study provides a co-reinforcement strategy generated by SP coupled with hydroxyapatite nanosheets for effective improvement of mechanical and frictional properties of carbon matrix composites that are used for aerospace and military industry applications.

关 键 词：Silicon nitride nanowire Coaxial structure Hydroxyapatite nanosheet Mechanical strength Friction performance Carbon matrix composites 

分 类 号：TB332[一般工业技术—材料科学与工程]