Microstructure, phase and electrical conductivity analyses of spark plasma sintered boron carbide machined with WEDM

被引：16

作者：

Pramanick, Ayan ^{[1
]}

Dey, Partha Pratim ^{[1
]}

Das, Probal Kr ^{[2
]}

机构：

[1] Indian Inst Engn Sci & Technol, Mech Engn Dept, Sibpur 711103, Howrah, India

[2] CSIR Cent Glass & Ceram Res Inst, Nonoxide Ceram & Composites Div, Kolkata 700032, India

来源：

CERAMICS INTERNATIONAL | 2020年 / 46卷 / 03期

关键词：

Boron carbide; Spark plasma sintering; Electrical conductivity; Microstructure; MECHANICAL-PROPERTIES; PARAMETERS; DENSIFICATION; TEMPERATURE; PRESSURE; CRYSTAL; CARBON; POWDER; B13C2;

D O I：

10.1016/j.ceramint.2019.09.282

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Electrical conductivity is an essential property for machining of sintered boron carbide especially by wire electrical discharge machining (WEDM) process. Pure boron carbide was spark plasma sintered to full density at 2050 degrees C. Rietveld refinement on XRD analysis confirmed presence of B13C2 as the major phase in the powder as well as in the sintered samples.Electrical conductivity was found to be similar to 48 Omega(-1) m(-1). The sintered specimens were successfully machined using WEDM technique. The microstructure of powder, machined and fractured surfaces of the sintered boron carbide were analyzed. At low power of WEDM with pulse current less than 140 A formation of molten, oxidized phases of boron carbide was observed as well as the development of surface cracks were minimum on the machined surface. Thus this work is aiming at achieving better product quality with sintered boron carbide specimens which are machined by WEDM.

引用

页码：2887 / 2894

页数：8

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