Heat Treatment and Oxidation Characteristics of Nb-20Mo-15Si-5B-20(Cr,Ti) Alloys from 700 to 1400°C

被引：3

作者：

Natividad, Sylvia ^{[1
]}

Acosta, Arianna ^{[1
]}

Amato, Krista ^{[1
]}

Ventura, Julieta ^{[1
]}

Protillo, Benedict ^{[1
]}

Varmar, S. K. ^{[1
]}

机构：

[1] Univ Texas El Paso, Dept Met & Mat Engn, El Paso, TX 79968 USA

来源：

THERMEC 2009, PTS 1-4 | 2010年 / 638-642卷

关键词：

Oxidation; EDS; X-ray mapping; XRD; SEM; Oxide-metal interface; IN-SITU COMPOSITES; MO; BEHAVIOR; SYSTEM; TI; HF;

D O I：

10.4028/www.scientific.net/MSF.638-642.2351

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nb-20Mo-15Si-5B-20(Cr,Ti) alloys have been subjected to annealing treatment for 2 hours in a range of temperatures from 700 to 1400 C and quenched in water to perform the microstructural characterization for these two new alloys. As cast structure consists of a solid solution phase, a, and suicides (Nb(5)Si(3)) in both alloys but Cr alloy also contains.NbCr(2) and Nb(3)Si phases. Heating to higher temperature introduces Ti suicides in the microstructure for Ti alloy:,The oxidation in air has been conducted on these alloys in the same temperature range for 24 hours. Weight gain per unit area as a function of temperature provides the oxidation curves while characterization techniques using SEM, EDS on SEM, x-ray mapping, and XRD has yielded the analyses of the oxide scale. The scale consists of various oxides of Nb, Mo, Cr, Si, and Ti. Cr alloy appears to offer higher oxidation resistance in the selected range of oxidation temperatures.

引用

页码：2351 / 2356

页数：6

共 16 条

[1]

*ASM INT, 1990, ASM MET HDB M FORM, P98

[2]

*ASM INT, 1999, METALS HDB, V3

[3]

CHEN KS, 2003, METALLURGICAL MAT A, V13, P589

[4]

*COMP LLC, 2007, PANDAT PHAS DIAGR CA

[5] A study of the microstructures and oxidation of Nb-Si-Cr-Al-Mo in situ composites alloyed with Ti, Hf and Sn [J].

Geng, Jie ;

Tsakiropoulos, Panos .

INTERMETALLICS, 2007, 15 (03) :382-395

[6] Oxidation of Nb-Si-Cr-Al in situ composites with Mo, Ti and Hf additions [J].

Geng, Jie ;

Tsakiropoulos, Panos ;

Shao, Guosheng .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 441 (1-2) :26-38

[7]

KAKARLAPUDI P, 2006, PROCESSING FABRICATI, V15, P131

[8]

MARIA D, 2008, J MET, V60, P66

[9] Oxidation behavior of αMo-Mo3Si-Mo5SiB2 (T2) three phase system [J].

Mendiratta, MG ;

Parthasarathy, TA ;

Dimiduk, DM .

INTERMETALLICS, 2002, 10 (03) :225-232

[10] Oxide scale formation and isothermal oxidation behavior of Mo-Si-B intermetallics at 600-1000°C [J].

Meyer, MK ;

Thom, AJ ;

Akinc, M .

INTERMETALLICS, 1999, 7 (02) :153-162

← 1 2 →