Effect of nano-graphite addition on the densification of ZrB2-SiC composites fabricated by spark plasma sintering

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AHMADI ZOHREH; Jaberi Zamharir Mehran; Shahedi Asl Mehdi; Parvizi Soroush

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Journal: Journal of Advanced Processes in Materials Engineering Year:2019 | Volume:12 | Issue:4 (47) Page(s): 53-65

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Title

Effect of nano-graphite addition on the densification of ZrB2-SiC composites fabricated by spark plasma sintering

Author(s)

AHMADI ZOHREH | Jaberi Zamharir Mehran | Shahedi Asl Mehdi | Parvizi Soroush | Issue Writer Certificate

Keywords

Spark Plasma SinteringQ1

Ultrahigh Temperature CompositesQ1

Densification BehaviorQ2

Nano-GraphiteQ1

Abstract

Ultrahigh temperature ZrB2-25 vol% SiC composites reinforced with different amount of Nano-Graphite (0, 2. 5, 5, 7. 5 and 10 wt%) were fabricated by Spark Plasma Sintering process. The effect of graphite nano-flake on the Densification Behavior of the mentioned composites were investigated. Spark Plasma Sintering was carried out at a temperature of 1900 ° C for a dwell time of 7 min under an applied pressure of 40 MPa. A fully dense ZrB2-SiC composite (with relative density of 100. 6%) was obtained by the addition of 5 wt% Nano-Graphite. However, the relative densities of graphite-free and 10 wt% Nano-Graphite reinforced composites were measured 100% and 98. 3%, respectively. Elimination of oxide impurities through the chemical reactions with graphite as well as formation of sub-micron phases caused to an enhancement in the densification. In addition, the in-situ formed ZrC phase was one of the reasons behind the increasing of relative density.

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APA: Copy

AHMADI, ZOHREH, Jaberi Zamharir, Mehran, Shahedi Asl, Mehdi, & Parvizi, Soroush. (2019). Effect of nano-graphite addition on the densification of ZrB2-SiC composites fabricated by spark plasma sintering. ADVANCED PROCESSES IN MATERIALS, 12(4 (47) ), 53-65. SID. https://sid.ir/paper/172638/en

Vancouver: Copy

AHMADI ZOHREH, Jaberi Zamharir Mehran, Shahedi Asl Mehdi, Parvizi Soroush. Effect of nano-graphite addition on the densification of ZrB2-SiC composites fabricated by spark plasma sintering. ADVANCED PROCESSES IN MATERIALS[Internet]. 2019;12(4 (47) ):53-65. Available from: https://sid.ir/paper/172638/en

IEEE: Copy

ZOHREH AHMADI, Mehran Jaberi Zamharir, Mehdi Shahedi Asl, and Soroush Parvizi, “Effect of nano-graphite addition on the densification of ZrB2-SiC composites fabricated by spark plasma sintering,” ADVANCED PROCESSES IN MATERIALS, vol. 12, no. 4 (47) , pp. 53–65, 2019, [Online]. Available: https://sid.ir/paper/172638/en

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