Preparation of 10B Enriched B4C Ceramics by Pressureless Sintering

Yu Jun Zhang; Sha Li Tan; Ru Bin Wei; Shu He Ai; Hai Bin Sun

doi:10.4028/www.scientific.net/KEM.602-603.540

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Preparation of 10B Enriched B4C Ceramics by...

Preparation of ¹⁰B Enriched B₄C Ceramics by Pressureless Sintering

Abstract:

Boron carbide is an attractive neutron absorbing material used both in Fast Breeder Reactors (FBR) and in Pressurised Water Reactors (PWR) owing to its very high absorption cross section for thermal neutrons, chemical stability and refractory character. In the present paper, ¹⁰B enriched B₄C ceramics are prepared by pressureless sintering at 19602160°C, under argon, using ¹⁰B boron carbide powder as raw material, 18 wt% phenolic resin as sintering aid. In the sintering temperature range, with the increasing of sintering temperature, both the relative density and flexural strength increase linearly, the average particle sizes increase from about 3μm at 1960°C to more than 30μm at 2160°C. The sample sintered at 1960°C has a 91.7% of relative density and 192 MPa of flexural strength and a homogeneous texture with 3-4μm particle size, which are enough for pellet application of reactors.

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Periodical:

Key Engineering Materials (Volumes 602-603)

Pages:

540-543

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.602-603.540

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Online since:

March 2014

Authors:

Yu Jun Zhang*, Sha Li Tan, Ru Bin Wei, Shu He Ai, Hai Bin Sun

Keywords:

¹⁰B Enrich, B₄C Ceramics, Pressureless Sintering

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