Pabi, S. K. ; Joardar, J. ; Manna, I. ; Murty, B. S. (1997) Nanocrystalline phases in Cu---Ni, Cu---Zn and Ni---Al systems by mechanical alloying Nanostructured Materials, 9 (1-8). pp. 149-152. ISSN 0965-9773
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09659...
Related URL: http://dx.doi.org/10.1016/S0965-9773(97)00040-8
Abstract
Nanocrystalline solid solutions and intermetallic phases in Cu---Ni (enthalpy of formation, ΔHf≈2kJ/mol), Cu---Zn(ΔHf≈-8kJ/mol) and disordered Ni3Al (ΔHf≈-42kJ/mol) in Ni---Al system formed during mechanical alloying (MA) through conventional continuous diffusive mixing mechanism. In contrast, nanocrystalline ordered NiAl (ΔHf=-72kJ/mol) and NiAl3 (ΔHf=-39kJ/mol) formed during MA by a discontinuous additive mixing mechanism. Ternary additions of Fe and Cr made the as-milled NiAl phase disordered, and the alloying mechanism changed over to the continuous diffusive mode.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 18701 |
| Deposited On: | 17 Nov 2010 12:33 |
| Last Modified: | 06 Jun 2011 08:52 |
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