BARC/PUB/2020/0517

 
 

Densification, Microstructure Evolution and Properties of B4C-NiAl Composite

 
     
 
Author(s)

Sonber, J. K.; Majumdar, S.; Kain, V.
(MP&CED)

Source

Journal of Materials Engineering and Performance, 2020. Vol. 29 (4): pp. 2374-2385

ABSTRACT

Boron carbide is a useful material due to its attractive properties, but its applications are limited due to difficulties associated with its processing. This paper presents the results of experimental studies carried out on densification, microstructural characterization and property evolution of B4C-NiAl composite. Densification studies revealed that NiAl addition to B4C results in its densification at a lower hot pressing temperature of 1700 °C at a pressure of 35 MPa. The enhancement in the densification is attributed to liquid-phase sintering caused by the presence of liquid NiAl at 1700 °C. Microstructural characterization revealed that B4C and NiAl phases are compatible with each other. NiAl addition has been found to decrease the hardness and increase the fracture toughness. B4C-NiAl composite was found to have good oxidation resistance at 900 °C in air. Tribology studies have shown that B4C-NiAl composite has good wear resistance against WC ball..

 
 
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