Mandal, Saikat and Chakraborty, Shirshendu and Dey, ParthaPratim (2022) A study of mechanical properties and WEDM machinability of spark plasma sintered ZrB2-B4C ceramic composites. Micron, 153. Art No-103198. ISSN 0968-4328

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Abstract

Four different compositions of ZrB2-B4C composites (i.e., 5, 15, 20, 25 Wt. % of B4C) were fabricated by Spark Plasma Sintering Technique (SPS) at 2000 degrees C temperature. The composites were characterized by the evolution of physical and mechanical properties; X-Ray Diffraction (XRD) analysis was also done for phase analysis of the composites. The relative density values were obtained in the range of 96.14-97.78 % of all the composites. The addition of B4C in ZrB2 matrix led to an enhancement in hardness (15.38 GPa at 5 wt.% B4C to 20.49 GPa at 25 wt.% B4C measured at 1.0 kgf load) and fracture toughness (from 2.93 MPa-m(0.5) at 5 wt.% B4C to 4.13 MPa-m(0.5) at 25 wt.% B4C measured at 1.0 kgf load). The composite samples were processed by wire electrical discharge machining (WEDM) process with three different parameters set for the study of machining speed, surface roughness. The composite with 25 wt.% of B4C shows highest machining speed of 10.56 mm(2)/min. The average surface roughness (R-a) of the WEDM processed composite surfaces lies in the range of 1.26-5.64 mu m.

Item Type:	Article
Subjects:	Engineering Materials
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	31 Aug 2023 12:09
Last Modified:	31 Aug 2023 12:09
URI:	http://cgcri.csircentral.net/id/eprint/5478

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