Premium
Microstructure and Mechanical Properties of Fine Structured B 4 C/2024 Al Composites with High B 4 C Content
Author(s) -
Zheng Ruixiao,
Ma Fengmei,
Zhang Yitan,
Ma Chaoli
Publication year - 2017
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201700047
Subject(s) - materials science , microstructure , composite material , scanning electron microscope , transmission electron microscopy , particle size , grain size , consolidation (business) , thermal expansion , nanotechnology , chemical engineering , engineering , accounting , business
In this study, bulk fine structured B 4 C/2024 Al composites with various B 4 C content are prepared by mechanical milling and subsequent hot consolidation. Scanning electron microscopy (SEM) observation revealed that the higher the B 4 C content, the finer the B 4 C particle size in the bulk composites. Transmission electron microscopy (TEM) observation indicates that the grain size of the Al matrix around the B 4 C particles is much finer compared to other, area due to the large difference in coefficients of thermal expansion (CTE) between the Al matrix and the B 4 C particles. Room temperature compression test reveals that with increasing B 4 C content, the compression strength of the bulk samples first increases and then decreases. The significant change of the mechanical properties is discussed based on the microstructure observed.