Bulk boron carbide nanostructured ceramics by reactive spark plasma sintering

Bulk boron carbide (B4C) ceramics was fabricated from a boron and carbon mixture by use of one-step reactive spark plasma sintering (RSPS). It was also demonstrated that preliminary high-energy ball milling (HEBM) of the B+C powder mixture leads to the formation of B/C composite particles with enhan...

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Bibliographic Details
Published in:Ceramics international 2017-08, Vol.43 (11), p.8190-8194
Main Authors: Moskovskikh, D.O., Paramonov, K.A., Nepapushev, A.A., Shkodich, N.F., Mukasyan, A.S.
Format: Article
Language:English
Subjects:
Boron carbide
Ceramics
High-energy ball milling
Mechanical activation
Reactive sintering
Spark plasma sintering
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Summary:Bulk boron carbide (B4C) ceramics was fabricated from a boron and carbon mixture by use of one-step reactive spark plasma sintering (RSPS). It was also demonstrated that preliminary high-energy ball milling (HEBM) of the B+C powder mixture leads to the formation of B/C composite particles with enhanced reactivity. Using these reactive composites in RSPS permits tuning of synthesized B4C ceramic microstructure. Optimization of HEBM + RSPS conditions allows rapid (less than 30min of SPS) fabrication of B4C ceramics with porosity less than 2%, hardness of ~35GPa and fracture toughness of ~ 4.5MPam 1/2
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2017.03.145