Improvement in the oxidation resistance of Nb-Ti-Si-Cr-Al-Hf alloys containing alloyed Ge and B

被引：73

作者：

Su, Linfen ^{[1
]}

Jia, Lina ^{[1
]}

Weng, Junfei ^{[1
]}

Hong, Zhen ^{[1
]}

Zhou, Chungen ^{[1
]}

Zhang, Hu ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

来源：

CORROSION SCIENCE | 2014年 / 88卷

关键词：

Intermetallics; SEM; EPMA; Oxidation; HIGH-TEMPERATURE; FRACTURE-TOUGHNESS; SILICIDE COATINGS; PACK CEMENTATION; COMPOSITES; MICROSTRUCTURE; ADDITIONS; BEHAVIOR; SYSTEM; MO;

D O I：

10.1016/j.corsci.2014.08.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation behaviour for Nb-Si based alloys was performed in air at 1200 degrees C and 1250 degrees C. The weight gains of Nb-24Ti-15Si-13Cr-2Al-2Hf (at.%) alloy and Nb-24Ti-15Si-13Cr-2Al-2Hf-4B-5Ge (at.%) alloy after oxidation at 1250 degrees C for 100 h were 156.7 mg/cm(2) and 32.5 mg/cm(2), respectively. The oxide scale of the Nb-24Ti-15Si-13Cr-2Al-2Hf (at.%) alloy was porous and loose, while that of the Nb-24Ti-15Si-13Cr-2Al-2Hf-4B-5Ge (at.%) alloy was dense and protective. The presence of alloyed B and Ge improved the protective SiO2 phase grown during high temperature oxidation, leading to the formation of a continuous and dense oxide scale. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：460 / 465

页数：6

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