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Fabrication of magnesium-boron carbide metal matrix composite by powder metallurgy route: Comparison between microwave and spark plasma sintering.

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Bibliographic Details
Title: Fabrication of magnesium-boron carbide metal matrix composite by powder metallurgy route: Comparison between microwave and spark plasma sintering.
Authors: Ghasali, Ehsan1, Alizadeh, Masoud1 m-alizadeh@merc.ac.com, Niazmand, Morteza1, Ebadzadeh, Touradj1
Source: Journal of Alloys & Compounds. Mar2017, Vol. 697, p200-207. 8p.
Subjects: Boron carbides, Metallic composites, Powder metallurgy, Microwaves, Sintering, Ball mills
Abstract: Microwave and spark plasma sintering processes were used to produce magnesium-B 4 C metal matrix composites by powder metallurgy route. Magnesium powder with 5 wt% B 4 C in ethanol media was blended in a high-energy ball mill for 10 min. The sintering process was performed at 500° and 670 °C using spark plasma sintering and microwave furnace, respectively. XRD investigations revealed the crystallization of MgB 2 and Mg 2 C 3 compounds during both sintering processes. The mechanical examinations showed higher bending strength (191 ± 15 MPa) and microhardness (92 ± 7 Vickers) of SPS samples rather than microwave samples. FESEM images demonstrated uniform distribution of B 4 C reinforcements at grain boundaries of metallic matrix. The MAP analysis of SPS samples approved the formation of new compounds as a result of the reaction between magnesium and B 4 C. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:Microwave and spark plasma sintering processes were used to produce magnesium-B 4 C metal matrix composites by powder metallurgy route. Magnesium powder with 5 wt% B 4 C in ethanol media was blended in a high-energy ball mill for 10 min. The sintering process was performed at 500° and 670 °C using spark plasma sintering and microwave furnace, respectively. XRD investigations revealed the crystallization of MgB 2 and Mg 2 C 3 compounds during both sintering processes. The mechanical examinations showed higher bending strength (191 ± 15 MPa) and microhardness (92 ± 7 Vickers) of SPS samples rather than microwave samples. FESEM images demonstrated uniform distribution of B 4 C reinforcements at grain boundaries of metallic matrix. The MAP analysis of SPS samples approved the formation of new compounds as a result of the reaction between magnesium and B 4 C. [ABSTRACT FROM AUTHOR]
ISSN:09258388
DOI:10.1016/j.jallcom.2016.12.146