Low temperature fabrication of reaction bonded boron carbide composites infiltrated with Al-Si alloys

N. Frage, E. Oz, E. Ionash, H. Dilman, S. Hayun

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Thermodynamic analysis of the Mg-Al-O system at 1000K confirm that Mg vapor provides extremely low oxygen partial pressure, which is enough for the decomposition of the alumina layer covering the surface of molten aluminum. The contact angle of Al on the boron carbide substrate measured under Mg vapor is sufficient for free infiltration of the ceramic preforms. The fabrication of the RBBC composites infiltrated with pure aluminum and Al-Si was successfully conducted at temperature lower 1000°C under Mg vapor atmosphere. The microstructural examination of the composites revealed the presence of newly formed ceramic phases with a good adhesion to the initial boron carbide particles. The value of Young modulus (of about 330 GPa) and hardness (of about 1400HV) of the composites only slightly depend on the Si content. The flexural strength of the composites infiltrated with Al-20%Si alloy (of about 450MPa) is higher than the reported in the literature for the reaction bonded composites. The composites fabricated at low temperature display a good corrosion resistance in humid atmosphere.

Original languageEnglish
Title of host publicationAdvances in Ceramic Armor, Bioceramics, and Porous Materials - A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
EditorsJerry C. LaSalvia, Roger Narayan, Paolo Colombo, Paolo Colombo
PublisherAmerican Ceramic Society
Pages49-56
Number of pages8
Edition4
ISBN (Electronic)9781119274995, 9781119320135, 9781119320227, 9781119320241, 9781119321705, 9781119321743, 9781119321781
DOIs
StatePublished - 1 Jan 2017
Event14th Armor Ceramics Symposium - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 - Daytona Beach, United States
Duration: 24 Jan 201629 Jan 2016

Publication series

NameCeramic Engineering and Science Proceedings
Number4
Volume37
ISSN (Print)0196-6219

Conference

Conference14th Armor Ceramics Symposium - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
Country/TerritoryUnited States
CityDaytona Beach
Period24/01/1629/01/16

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