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alloys; solute trapping; rapid solidification; local-nonequilibrium diffusion; hyperbolic diffusion equation; solute concentration; solute flux fields 1 Introduction Rapid solidification phenomena occur... local-equilibrium theory [10-13,25]. 2 Local nonequilibrium diffusion model (LNDM) According to extended irreversible thermodynamics (EIT) [24] and some other local-nonequlibrium approaches [25-28......
diffusion effects shrink the initial transient period and lead to diffusionless solidification at high interface velocity. Key words: alloy solidification; initial transient; local-nonequilibrium diffusion... velocity, which is described by the local nonequilibrium diffusion model (LNDM) [9-11], and non-steady-state effects at low interface velocity [1]. 2 Formulation of LNDM 2.1 Classical equation The LNDM......
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SUPERPLASTICITY AND DIFFUSION BONDING OF IN718 SUPERALLOY K.F. Zhang1,D.Z. Wu1,W.B. Han1,B. Wang1 (1.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China) Abstract:The superplasticity and diffusion bonding of IN718 superalloy were studied in this article. The strain rate sensitivity index m was obtained at different temperatures and various initial......
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Diffusion barrier performance of nanoscale TaNx thin-film ZHOU Ji-cheng(周继承), CHEN Hai-bo(陈海波), LI You-zhen(李幼真) School of Physics Science and Technology, Central South University, Changsha..., and the diffusion barrier properties of TaNx thin-films is improved. TaN1.09 can prevent interdiffusion between Cu and Si effectively after annealing up to 650 ℃ for 60 s. The failure of TaNx is mainly......
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