Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Microstructure and mechanical properties of high content B_4C-aluminium composites fabricated by hot-pressing sintering

ZHANG Peng;ZHANG Zhe-wei;LI Yu-li;WANG Wen-xian;WANG Bao-dong;College of Material Science and Engineering,Taiyuan University of Technology;College of Physics and Optoelectronics,Taiyuan University of Technology;Shanxi Zhongtong High-tech Co.LTD;  
30% B4C(mass fraction) particle-reinforcing Al matrix composite with the average particle size 23 μm of was prepared by low temperature vacuum hot-pressing technique.The preparation temperature was between the solid and liquid phase line of the 6061Al matrix.The microstructure and mechanical property were analyzed.The results show that the particles are uniformly distributed in the B4C/Al composite without agglomeration and there is mutual diffusion between the particles and matrix.The interface bonds between matrix and reinforcer well.The hardness of B4C/Al composite is 34.9% higher than that of 6061 aluminum alloy.The fracture toughness of B4C/Al composite is 5.16 times larger than that of the B4C material and the yield strength increases 198.3% than that of the matrix.An analytical model for the strength of metal matrix composites presented by Ramakrishnan was selected to calculate the yield strength of the 30% B4C/Al composite.The results of theoretical calculations agree well with the experimental data.The strengthening mechanisms of B4C particle-reinforcing Al matrix composite with micron particle size are mainly loading strengthening and dislocation strengthening.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved