Research on Microstructure and Mechanical Properties of B₄C/Al Composites by Liquid Mental Mixing

Abstract

B4C/Al composites of different boron carbide contenting were prepared by the liquid mixing method and hot-rolled to 3mm. Microstructure and mechanical properties of the rolled composite were analyzed after the stress relieving heat treatment. Results showed that: the distribution of boron carbide particles was uniform, and only a few particles appeared fractured. With Ti addition, a reaction product layer was fabricated surrounding B4C particles, which acted as a diffusion barrier to separate B4C particles from liquid aluminum to protect them. With the mass fraction of the B4C particles increasing, it can improve the tensile strength but degrade the plasticity of the composites. The fracture surface of composites showed both ductile and brittle fracture characteristics and when the mass fraction of the B4C particles increased the ductile fracture feature decreased.

Effect of Processing Parameters on Mechanical Properties of Al7175/Boron Carbide (B4C) Composite Fabricated by Powder Metallurgy Techniques

“…In present days, instead of primary alloys all the industrial sectors using composite materials as their material of selection because of their high strength to weight ratio, wear resistance, chemical stability, thermal conductivity [2]. Majorly used reinforcements are B4C, SiC, Al2O3, CNT, Graphene, Graphite [19,20,26,27,28,29,30,31,32,33,34]. B4C has particular importance among remaining reinforcements because of its high hardness (third hardest after diamond and CBN [8]), strength, melting point [14] and chemical stability [17].…”

Chromosome Deletion and Translocation in Chinese Spring-Lophopyrum Elongatum6E Disomic Addition Lines Induced by the Gametocidal Chromosome 2C fromAegilops Cylindrica

“…in addition, both monosomic and disomic additions and substitutions of L. elongatum chromosome 4e conferred a polycarpic life history to annual chinese spring wheat (17). chromosomes 4e and 6e in L. elongatum may carry the genes that confer tolerance to phosphorus deficiency stress (20).…”