X-ray photoelectron spectroscopy and scanning Auger microprobe studies on oxidation-induced embrittlement mechanism of liquid-phase-sintered 95W-Ni-Fe alloy

被引：3

作者：

Ai, JH ^{[1
]}

He, F

机构：

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

[2] Tianjin Univ, State Key Lab CI Chem & Technol, Tianjin 300072, Peoples R China

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2003年 / 34卷 / 02期

关键词：

Auger electron spectroscopy - Bonding - Embrittlement - Failure analysis - Fracture mechanics - Interfaces (materials) - Oxidation - Oxides - Probes - Scanning electron microscopy - Sintering - X ray photoelectron spectroscopy;

D O I：

10.1007/s11661-003-0336-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxidation-induced embrittling mechanism of 95W-Ni-Fe alloy has been studied by X-ray photoelectron spectroscopy (XPS) and scanning Auger microprobe (SAM). Results show that when the alloy oxidizes, WO2 and WO3 form around the surface of tungsten particles, and Fe in the bonding phase oxidizes into Fe2O3 and FeO on the surface layer of the specimen; thus, surface layer embrittlement occurs as a result of bonding failure between the W particle and the bonding phase. The O diffuses into the matrix of the alloy along interfaces and predominantly segregates on some interfaces, and at the same time, O oxidizes Fe in the bonding phase, thus leading to interface embrittlement and the formation of a bulgy spheroidal fracture.

引用

页码：355 / 359

页数：5

共 8 条

[1] FRACTURE-BEHAVIOR OF W-NI-FE HEAVY ALLOYS [J].

CHURN, KS ;

GERMAN, RM .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1984, 15 (02) :331-338

[2]

FAROOP S, 1989, INT J REFRACT MET H, V12, P236

[3] TOUGHNESS VARIATION WITH TEST TEMPERATURE AND COOLING RATE FOR LIQUID-PHASE SINTERED W-3.5NI-1.5FE [J].

GERMAN, RM ;

HANAFEE, JE ;

DIGIALLONARDO, SL .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1984, 15 (01) :121-128

[4]

JOSHI A, 1970, METALL T, V1, P2534

[5] SEGREGATION TO INTERPHASE BOUNDARIES IN LIQUID-PHASE SINTERED TUNGSTEN ALLOYS [J].

LEA, C ;

MUDDLE, BC ;

EDMONDS, DV .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1983, 14 (04) :667-677

[6]

LU J, 1987, SURFACE ANAL TECHNOL

[7]

QI Y, 1989, ORDNANCE MAT SCI ENG, V8, P130

[8]

QI YX, 1990, ANAL CHEM, V18, P401

← 1 →