Segregation to interphase boundaries in liquid-phase sintered tungsten alloys

C. Lea, B. C. Muddle, D. V. Edmonds

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Abstract

Scanning Auger electron spectroscopy has been used to examine the distribution of impurity elements on the fracture surface of W-Ni-Fe alloys. High temperature heat treatment (1350 degree C) followed by water quenching reduces phosphorus segregation and improves the degree of cohesion across boundaries. Segregated sulfur is less uniformly distributed and its segregation level increases in heat treated specimens. Copper also segregates during heat treatment of W-Ni-Cu specimens; no segregation of iron was observed in the W-Ni-Fe system.

Original languageEnglish
Pages (from-to)667-677
Number of pages11
JournalMetallurgical Transactions A - Physical Metallurgy and Materials Science
Volume14 A
Issue number4
Publication statusPublished - 1 Jan 1983

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