Comparative study of spark plasma sintering features on the densification of Ni-Cr binary alloys

• Published in: MATEC Web of Conferences Vol. 249; p. 1004
• Main Authors: Babalola, B J, Shongwe, M B, Obadele, B A, Olubambi, P A, Ayodele, O O, Rominiyi, A L, Jeje, S O
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Les Ulis EDP Sciences 01.01.2018
• Subjects: Ball milling; Binary alloys; Chromium; Comparative studies; Densification; Hardness; Heating rate; Morphology; Nickel; Parameters; Plasma sintering; Pressing; Spark plasma sintering
• ISSN: 2261-236X; 2274-7214; 2261-236X
• DOI: 10.1051/matecconf/201824901004

Spark plasma sintering (SPS) has been widely regarded as an advanced powder consolidation technique hich helps in the development of array of engineering materials. Many have been reported in the literature about sintering parameters such as temperature, pressure, heating rate and holding time. However, little or no reports has been made on some of the intricate features such as process time(s), power SPS (KW), pressing speed (mm/min), and average pressing force (KN) on which intering parameters are directly related to. This study aims to investigate the behaviour of spark plasma sintered Ni-17Cr binary alloys with emphasis on the densification, hardness value and spark plasma sintering features such as process time (s), power SPS (KW), pressing speed (mm/min), and the average pressing force (KN). Nickel and chromium powders were milled individually using High energy ball milling for durations of 5hr, 10 hr prior to mixing and subsequent sintering. The sintered 5 hr and 10 hr milled Ni-17Cr binary alloys attained relative densities of 98.72 % and 99.1 % respectively. The Microstructural morphology was examined using Scanning electron microscopy (SEM). The sintered 10 hr milled Ni-17Cr binary alloy revealed the higher hardness.