Published 1996 | Version v1
Miscellaneous Metadata-only

Effect of additions on sintering of boron carbide

Creators

  • 1. Centro Tecnico Aeroespacial (CTA-IAE), Sao Jose dos Campos, SP (Brazil). Inst. de Atividades Espaciais
  • 2. Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)

Description

The special physical characteristics of boron carbide (B4C) allow its in a wide range of application in engineering design. Despite of this, the densification during sintering step became the main drawback of the development of ceramics components. The present work deals with the role of sintering aids on the densification of boron carbide ceramics produced through pressureless and hot-pressing sintering. The applied sintering aids were C, C+B2O3 and C+B2O3+Al+2O3. Dilatometry was used to assist hot-pressing and C, C+B2O3, C+B2O3+Al2O3 were the sintering aids. In the both cases the sintering temperature was lowered to 2200 K and 2073K, pressureless and hot-pressing respectively. The results of hardness of about 35 GPa and densification of 99% theoretical density for hot-pressed material show the effectiveness of these sintering aids. So far as the obtained data from this work is concerned we may believe that is possible to produce boron carbide ceramics components with both high density and hardness with lower cost by lowering sintering temperatures, that is, 200K for pressureless sintering and 350K for hot-pressing. (author)

Availability note (English)

Available from the library of the Brazilian Nuclear Energy Commission, Rio de Janeiro

Additional details

Additional titles

Original title (Portuguese)
Efeitos de aditivos na sinterizacao de carbeto de boro

Publishing Information

Imprint Pagination
6 p.

Conference

Title
6. General congress on nuclear energy
Original Conference Title
6. Congresso geral de energia nuclear
Dates
27 Oct - 1 Nov 1996
Place
Rio de Janeiro, RJ (Brazil)

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
31060788
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
BORON CARBIDES; BORON OXIDES; CARBON ADDITIONS; FRACTURE PROPERTIES; HOT PRESSING; MICROHARDNESS; MICROSTRUCTURE; SINTERING; TEMPERATURE RANGE 1000-4000 K
Descriptors DEC
ALLOYS; BORON COMPOUNDS; CARBIDES; CARBON COMPOUNDS; CHALCOGENIDES; FABRICATION; HARDNESS; MATERIALS WORKING; MECHANICAL PROPERTIES; OXIDES; OXYGEN COMPOUNDS; PRESSING; TEMPERATURE RANGE

Optional Information

Notes
12 refs., 10 figs., 5 tabs.