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ReserarchID
E209S
Crossref Journal DOI 10.17406/gjre
Print ISSN 0975-5861
e-ISSN 2249-4596
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The effect of ball milling on the compaction and sintering of nanocrystalline copper steel powder (FC-0205) was evaluated within this work. The as-received micron-sized FC-0205 copper steel powder was subjected to High Energy Ball Milling (HEBM) in an argon atmosphere at different milling times of 0, 16, 20 and 24 hours to obtain nanocrystalline structures. Unmilled, 8 and 16 hours milled powders were compacted using uniaxial die compression at pressures ranging from 274 MPa to 775 MPa to obtain a relative density range of 74% to 95%, respectively. The steel powder compacts were sintered at temperatures ranging from 400 °C to 1120 °C in high purity hydrogen and nitrogen atmospheres. X-ray Diffraction (XRD) and microscopy analysis were performed on the milled powder specimens to evaluate particle size, morphology, and extent of porosity; to establish a relationship between milling time and particle size, and to establish a correlation between grain size and milling time.
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