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Zr surface diffusion in tetragonal yttria stabilized zirconia

Authors:	Akash and M. J. Mayo

Affiliation:	(1) Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA

Abstract:	The value for surface diffusivity of Zr tetragonal ZrO₂–3mol% Y₂O₃ has been calculated from measurements of surface area reduction and pore growth in powder compacts during sintering. The surface diffusivity thereby obtained can be described by D $_{s,Zr^{ + 4} }$ =5.52×10⁵ exp[–531(kJ mol^-1)/RT] m²/s, which is in reasonable agreement with values calculated by prior researchers from direct TEM observation of neck growth between touching particles.

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