Suitability of nickel as alloying element in titanium sintered in solid state

Authors: Robertson, I. M.¹; Schaffer, G. B.²

Source: Powder Metallurgy, Volume 52, Number 3, September 2009 , pp. 225-232(8)

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Abstract:

The suitability of nickel as an alloying element in titanium alloys produced using the blended elemental powder metallurgy approach has been explored. Nickel initially accelerates sintering, providing greater densification at lower temperature than observed for unalloyed titanium. However, it provides only a minor improvement in the density achieved after long sintering times or at high solid state sintering temperatures. Swelling is observed under liquid phase sintering conditions. The highest density was achieved by sintering at just below the solidus temperature. Nickel also accelerates the Ostwald ripening of the pore structure and the conversion of open porosity into closed porosity.

Keywords: NICKEL; TITANIUM; POROSITY; DENSITY; SINTERING

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/003258908X336391

Affiliations: 1: ARC Centre of Excellence for Design in Light Metals, School of Engineering, The University of Queensland, St Lucia, 4072, Australia;, Email: i.robertson1@uq.edu.au 2: ARC Centre of Excellence for Design in Light Metals, School of Engineering, The University of Queensland, St Lucia, 4072, Australia

Publication date: 2009-09-01

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