The design, microstructure and mechanical properties of B4C/6061Al neutron absorber composites fabricated by SPS

H. S. Chen; W. X. Wang; Y. L. Li; J. Zhou; H. H. Nie; Q. C. Wu

doi:10.1016/j.matdes.2016.01.030

The design, microstructure and mechanical properties of B₄C/6061Al neutron absorber composites fabricated by SPS

H. S. Chen, W. X. Wang, Y. L. Li, J. Zhou, H. H. Nie, Q. C. Wu

School of Engineering (Behrend)

Research output: Contribution to journal › Article › peer-review

91 Scopus citations

Abstract

In this study, Monte Carlo N-Particle transport program (MCNP) is first used to calculate the neutron transmission ratio of B₄C/6061Al neutron absorber composites(NACs) with 5 vol.%-40 vol.% B₄C particle content at different thickness in vacuum. Then the composites have been synthesized by means of ball milling followed by spark plasma sintering (SPS). The effects of B₄C particle content on microstructure and mechanical properties of composite were experimentally investigated. Results show that the neutron transmission ratio decreased with the increase of B₄C particle content and the thickness of plate. The B₄C particles were homogeneously distributed in the metal matrix. Density was found to decrease with the increase of B₄C volume fraction. Reaction products of Ti₂B₅, AlB₁₂ and B were observed and identified in the composites. The microscopic electrical discharge in the gaps between the particles can generate plasma which can improve the particle/matrix interfacial bonding strength. With the increase of particle content, the strength of the NACs first increased and then decreased while elongation to fracture was almost decreased. The strengthening mechanism can be attributed to grain refinement, dislocation strengthening, load transfer effect and Orowan strengthening in NACs.

Original language	English (US)
Pages (from-to)	360-367
Number of pages	8
Journal	Materials and Design
Volume	94
DOIs	https://doi.org/10.1016/j.matdes.2016.01.030
State	Published - Mar 15 2016

All Science Journal Classification (ASJC) codes

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matdes.2016.01.030

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title = "The design, microstructure and mechanical properties of B4C/6061Al neutron absorber composites fabricated by SPS",

abstract = "In this study, Monte Carlo N-Particle transport program (MCNP) is first used to calculate the neutron transmission ratio of B4C/6061Al neutron absorber composites(NACs) with 5 vol.%-40 vol.% B4C particle content at different thickness in vacuum. Then the composites have been synthesized by means of ball milling followed by spark plasma sintering (SPS). The effects of B4C particle content on microstructure and mechanical properties of composite were experimentally investigated. Results show that the neutron transmission ratio decreased with the increase of B4C particle content and the thickness of plate. The B4C particles were homogeneously distributed in the metal matrix. Density was found to decrease with the increase of B4C volume fraction. Reaction products of Ti2B5, AlB12 and B were observed and identified in the composites. The microscopic electrical discharge in the gaps between the particles can generate plasma which can improve the particle/matrix interfacial bonding strength. With the increase of particle content, the strength of the NACs first increased and then decreased while elongation to fracture was almost decreased. The strengthening mechanism can be attributed to grain refinement, dislocation strengthening, load transfer effect and Orowan strengthening in NACs.",

author = "Chen, {H. S.} and Wang, {W. X.} and Li, {Y. L.} and J. Zhou and Nie, {H. H.} and Wu, {Q. C.}",

note = "Funding Information: This work were supported by the “ The Key Science and Technology Program of Shanxi Province, China ” (Grant No. 20130321024 ) and “ The Graduate Innovation Project of Shanxi Province, China ” (Grant No. B2014005 ), which is highly appreciated. Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd.",

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day = "15",

doi = "10.1016/j.matdes.2016.01.030",

language = "English (US)",

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T1 - The design, microstructure and mechanical properties of B4C/6061Al neutron absorber composites fabricated by SPS

AU - Chen, H. S.

AU - Wang, W. X.

AU - Li, Y. L.

AU - Zhou, J.

AU - Nie, H. H.

AU - Wu, Q. C.

N1 - Funding Information: This work were supported by the “ The Key Science and Technology Program of Shanxi Province, China ” (Grant No. 20130321024 ) and “ The Graduate Innovation Project of Shanxi Province, China ” (Grant No. B2014005 ), which is highly appreciated. Publisher Copyright: © 2016 Elsevier Ltd.

PY - 2016/3/15

Y1 - 2016/3/15

N2 - In this study, Monte Carlo N-Particle transport program (MCNP) is first used to calculate the neutron transmission ratio of B4C/6061Al neutron absorber composites(NACs) with 5 vol.%-40 vol.% B4C particle content at different thickness in vacuum. Then the composites have been synthesized by means of ball milling followed by spark plasma sintering (SPS). The effects of B4C particle content on microstructure and mechanical properties of composite were experimentally investigated. Results show that the neutron transmission ratio decreased with the increase of B4C particle content and the thickness of plate. The B4C particles were homogeneously distributed in the metal matrix. Density was found to decrease with the increase of B4C volume fraction. Reaction products of Ti2B5, AlB12 and B were observed and identified in the composites. The microscopic electrical discharge in the gaps between the particles can generate plasma which can improve the particle/matrix interfacial bonding strength. With the increase of particle content, the strength of the NACs first increased and then decreased while elongation to fracture was almost decreased. The strengthening mechanism can be attributed to grain refinement, dislocation strengthening, load transfer effect and Orowan strengthening in NACs.

AB - In this study, Monte Carlo N-Particle transport program (MCNP) is first used to calculate the neutron transmission ratio of B4C/6061Al neutron absorber composites(NACs) with 5 vol.%-40 vol.% B4C particle content at different thickness in vacuum. Then the composites have been synthesized by means of ball milling followed by spark plasma sintering (SPS). The effects of B4C particle content on microstructure and mechanical properties of composite were experimentally investigated. Results show that the neutron transmission ratio decreased with the increase of B4C particle content and the thickness of plate. The B4C particles were homogeneously distributed in the metal matrix. Density was found to decrease with the increase of B4C volume fraction. Reaction products of Ti2B5, AlB12 and B were observed and identified in the composites. The microscopic electrical discharge in the gaps between the particles can generate plasma which can improve the particle/matrix interfacial bonding strength. With the increase of particle content, the strength of the NACs first increased and then decreased while elongation to fracture was almost decreased. The strengthening mechanism can be attributed to grain refinement, dislocation strengthening, load transfer effect and Orowan strengthening in NACs.

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The design, microstructure and mechanical properties of B₄C/6061Al neutron absorber composites fabricated by SPS

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