Abstract：
:Boron carbide (B4C) coating on diamond particle is synthesized by heating diamond particles in a powder mix of H3BO3 and B in Ar atmosphere. The composition, bond state and coverage fraction of boron carbide coating on diamond particles are investigated. The boron carbide coating favors to grow on diamond (100) surface rather than on diamond (111) surface. Cu matrix composites reinforced with B4C-coated diamond particles were made by powder metallurgy. The addition of B4C coating gave rise to a dense composite. The influence of B4C coating on both tensile strength and thermal conductivity of the composite were investigated. When the B4C fully covered on diamond particles, the composite exhibited a greatly increase in tensile strength (115 MPa) which was much higher than that for uncoated-diamond/Cu (60 MPa) composites. Meanwhile, a high thermal conductivity of 687 W/mK was achieved in the B4C-coated-diamond/Cu composites.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Sun Y,He L,Zhang C,Meng Q,Liu B,Gao K,Wen M,Zheng Wdoi
10.1038/s41598-017-11142-ysubject
Has Abstractpub_date
2017-09-06 00:00:00pages
10727issue
1issn
2045-2322pii
10.1038/s41598-017-11142-yjournal_volume
7pub_type
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