Sintering of Commercial B4C with Synthesized B4C Additions

Rosa Maria da Rocha; Jonas S. Gutierres; Francisco Cristóvão Lourenço de Melo

doi:10.4028/www.scientific.net/MSF.591-593.588

Paper Titles

α-SiAlON: Development and Machining Test on Gray Cast Iron
p.565

Comparative Study on Turning CI and CGI Using Silicon Nitride Cutting Tools
p.572

Precursor Influence on the Obtention of β-SiC Hollow Fibers
p.578

Stacking Faults in SiC_f/SiC Composite Obtained by Chemical Vapor Reaction Process
p.583

Sintering of Commercial B₄C with Synthesized B₄C Additions
p.588

High and Room Temperature Mechanical Evaluation of SiC Ceramics with Alumina and Rare Earth Oxides Additions
p.593

Study of Cutting Forces on Machinability Properties of Gray Cast Iron Using New Ceramics Cutting Tools
p.598

Turning of Compacted Graphite Iron Using Commercial TiN Coated Si₃N₄ under Dry Machining Conditions
p.604

Effect of the Two-Steps Sintering in the Microstructure of Ultrafine Alumina
p.611

HomeMaterials Science ForumMaterials Science Forum Vols. 591-593Sintering of Commercial B4C with Synthesized B4C...

Sintering of Commercial B₄C with Synthesized B₄C Additions

Abstract:

Boron Carbide is a ceramic material of technological application due to its extreme hardness and high chemical and thermal stability. The effect of synthesized boron carbide addition on pressureless sintering and hot-pressing of a commercial B4C was investigated. B4C synthesized by carbothermal reduction using carbon black as carbon source was mixtured in 10, 30 and 50 wt% to a commercial B4C. Powder mixtures were compacted into pellets and sintered by pressureless sintering at 2050 °C/30min Samples were compared to a pure commercial B4C and characterization results have not showed great differences. Relative densities of as-sintered materials exceed 93% of theoretical for all compositions and microhardness Hv of ∼ 32 GPa was obtained.