Growth kinetics analysis of Nb–Al intermetallic compounds interfacial layers based on Nb–Al phase diagram

Xianjun Lei; Xiaopeng Wang; Fantao Kong; Haitao Zhou; Yuyong Chen

doi:10.1016/j.vacuum.2021.110589

Growth kinetics analysis of Nb–Al intermetallic compounds interfacial layers based on Nb–Al phase diagram

Xianjun Lei
, Xiaopeng Wang
, Fantao Kong^*
, Haitao Zhou
, Yuyong Chen

^*Corresponding author for this work

School of Materials Science and Engineering

Harbin Institute of Technology
Harbin Institute of Technology
Shanghai Spaceflight Precision Machinery Institute

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

A model for studying the growth kinetics of intermetallic compounds by means of binary phase diagrams was proposed with some assumptions. The parabolic growth relationship of intermetallic compound is deduced mathematically using analytical solution of diffusion equations and the mass balance law. By comparing the solubility of the adjacent phase in intermetallic compound phase, the predominant parameter controlling the growth kinetics is the solute diffusion coefficient. The diffusion coefficient of Al atoms in intermetallic layers is quantitatively described and the smallest diffusion coefficient is 0.373 × 10⁻²¹ m²/s in Nb₃Al phase. It is demonstrated intermetallic layers formed at interface indeed inhibit the Nb container being corroded further by TiAl melt, and Nb₃Al layer is a dominant factor.

Original language	English
Article number	110589
Journal	Vacuum
Volume	194
DOIs	https://doi.org/10.1016/j.vacuum.2021.110589
State	Published - Dec 2021

Keywords

Diffusion coefficient
Growth kinetics
Intermetallic compound
Niobium aluminides
Phase diagram

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10.1016/j.vacuum.2021.110589

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title = "Growth kinetics analysis of Nb–Al intermetallic compounds interfacial layers based on Nb–Al phase diagram",

abstract = "A model for studying the growth kinetics of intermetallic compounds by means of binary phase diagrams was proposed with some assumptions. The parabolic growth relationship of intermetallic compound is deduced mathematically using analytical solution of diffusion equations and the mass balance law. By comparing the solubility of the adjacent phase in intermetallic compound phase, the predominant parameter controlling the growth kinetics is the solute diffusion coefficient. The diffusion coefficient of Al atoms in intermetallic layers is quantitatively described and the smallest diffusion coefficient is 0.373 × 10−21 m2/s in Nb3Al phase. It is demonstrated intermetallic layers formed at interface indeed inhibit the Nb container being corroded further by TiAl melt, and Nb3Al layer is a dominant factor.",

keywords = "Diffusion coefficient, Growth kinetics, Intermetallic compound, Niobium aluminides, Phase diagram",

author = "Xianjun Lei and Xiaopeng Wang and Fantao Kong and Haitao Zhou and Yuyong Chen",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = dec,

doi = "10.1016/j.vacuum.2021.110589",

language = "英语",

volume = "194",

journal = "Vacuum",

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TY - JOUR

T1 - Growth kinetics analysis of Nb–Al intermetallic compounds interfacial layers based on Nb–Al phase diagram

AU - Lei, Xianjun

AU - Wang, Xiaopeng

AU - Kong, Fantao

AU - Zhou, Haitao

AU - Chen, Yuyong

PY - 2021/12

Y1 - 2021/12

N2 - A model for studying the growth kinetics of intermetallic compounds by means of binary phase diagrams was proposed with some assumptions. The parabolic growth relationship of intermetallic compound is deduced mathematically using analytical solution of diffusion equations and the mass balance law. By comparing the solubility of the adjacent phase in intermetallic compound phase, the predominant parameter controlling the growth kinetics is the solute diffusion coefficient. The diffusion coefficient of Al atoms in intermetallic layers is quantitatively described and the smallest diffusion coefficient is 0.373 × 10−21 m2/s in Nb3Al phase. It is demonstrated intermetallic layers formed at interface indeed inhibit the Nb container being corroded further by TiAl melt, and Nb3Al layer is a dominant factor.

AB - A model for studying the growth kinetics of intermetallic compounds by means of binary phase diagrams was proposed with some assumptions. The parabolic growth relationship of intermetallic compound is deduced mathematically using analytical solution of diffusion equations and the mass balance law. By comparing the solubility of the adjacent phase in intermetallic compound phase, the predominant parameter controlling the growth kinetics is the solute diffusion coefficient. The diffusion coefficient of Al atoms in intermetallic layers is quantitatively described and the smallest diffusion coefficient is 0.373 × 10−21 m2/s in Nb3Al phase. It is demonstrated intermetallic layers formed at interface indeed inhibit the Nb container being corroded further by TiAl melt, and Nb3Al layer is a dominant factor.

KW - Diffusion coefficient

KW - Growth kinetics

KW - Intermetallic compound

KW - Niobium aluminides

KW - Phase diagram

UR - https://www.scopus.com/pages/publications/85115008179

U2 - 10.1016/j.vacuum.2021.110589

DO - 10.1016/j.vacuum.2021.110589

M3 - 文章

AN - SCOPUS:85115008179

SN - 0042-207X

VL - 194

JO - Vacuum

JF - Vacuum

M1 - 110589

ER -

Growth kinetics analysis of Nb–Al intermetallic compounds interfacial layers based on Nb–Al phase diagram

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Keywords

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