Isothermal oxidation mechanism of a newly developed Nb-Ti-V-Cr-Al-W-Mo-Hf alloy at 800-1200 °C

被引：52

作者：

Zheng, Jianshu ^{[1
]}

Hou, Xinmei ^{[2
]}

Wang, Xiangbin ^{[1
]}

Meng, Ye ^{[1
]}

Zheng, Xin ^{[3
]}

Zheng, Lei ^{[1
,4
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Met & Ecol Engn, Beijing 100083, Peoples R China

[3] Northwest Inst Nonferrous Met Res, Ctr New Mat Res, Xian 710016, Peoples R China

[4] Beijing Key Lab Special Melting & Preparat High E, Beijing 100083, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2016年 / 54卷

基金：

北京市自然科学基金; 中国国家自然科学基金; 中国博士后科学基金; 芬兰科学院;

关键词：

Nb-based alloy; XRD; EPMA; Isothermal oxidation; Diffusion; Interface reaction; HIGH-TEMPERATURE OXIDATION; NI-BASED SUPERALLOY; RESISTANCE; BEHAVIOR; NIOBIUM; MICROSTRUCTURE; PROPERTY; KINETICS; OXYGEN;

D O I：

10.1016/j.ijrmhm.2015.08.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Oxidation performance of a newly developed Nb-Ti-V-Cr-Al-W-Mo-Hf alloy at 800-1200 degrees C for 5 h in flowing air was investigated via isothermal oxidation testing, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and electron probe microanalysis. The results indicated that the kinetics followed a mixed parabolic-linear law and the oxidation activation energies were obtained. The oxidation region consisted of external oxide layer (EOL) and internal oxidation zone (IOZ). EOLs were composed of TiO2, Nb9VO25 and CrVNbO6 at 800 degrees C TiO2 and TiNb2O7 at 1100 degrees C and CrVNbO6 and TiNb2O7 at 1200 degrees C. Ti-, Hf- and Nb-rich internal oxides were observed in IOZ. The theoretical and experimental analysis suggested that the chemical reactions in oxide/alloy interface and diffusion of Ti4+ and O2- in alloy were the mechanism to understand the oxidation process. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：322 / 329

页数：8

共 45 条

[1] Barin I., 2008, Thermochemical Data of Pure Substances, VThird
[2] Birks N, 2006, INTRODUCTION TO THE HIGH-TEMPERATURE OXIDATION OF METALS, 2ND EDITION, P1, DOI 10.1017/CBO9781139163903
[3] Oxidation behavior of two-phase γ+σNb-Ti-Al alloys
Brady, MP
Verink, ED
Smith, JW
[J]. OXIDATION OF METALS, 1999, 51 (5-6): : 539 - 556
[4] VM9O25(M = NB, TA), A COMBINATION OF TETRAHEDRAL VO4 AND OCTAHEDRAL MO6 UNITS
CASAIS, MT
GUTIERREZPUEBLA, E
MONGE, MA
RASINES, I
RUIZVALERO, C
[J]. JOURNAL OF SOLID STATE CHEMISTRY, 1993, 102 (01) : 261 - 266
[5] Chan K.S., 2004, METALL MATER TRANS A, V35, P579
[6] Cyclic-oxidation resistance of niobium-base in situ composites:: Modeling and experimentation
Chan, KS
[J]. OXIDATION OF METALS, 2004, 61 (3-4): : 165 - 194
[7] Oxidation behavior of Nb-Si-B alloys with the NbSi2 coating layer formed by a pack cementation technique
Cheng, Jingchang
Yi, Seonghoon
Park, Joon Sik
[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2013, 41 : 103 - 109
[8] Enhanced oxidation resistance of Ti(C,N)-based cermets containing Ta
Chicardi, E.
Gotor, F. J.
Cordoba, J. M.
[J]. CORROSION SCIENCE, 2014, 84 : 11 - 20
[9] Chromia layer growth on a Ni-based superalloy: Sub-parabolic kinetics and the role of titanium
Cruchley, S.
Evans, H. E.
Taylor, M. P.
Hardy, M. C.
Stekovic, S.
[J]. CORROSION SCIENCE, 2013, 75 : 58 - 66
[10] Oxidation of refractory metals in air and low pressure oxygen gas
DiStefano, JR
Pint, BA
DeVan, JH
[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2000, 18 (4-5) : 237 - 243

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