ION MICROPROBE ANALYSIS FOR NIOBIUM HYDRIDE IN HYDROGEN-EMBRITTLED NIOBIUM.

Peter Williams, Charles A. Evans, Martin L. Grossbeck, Howard K. Birnbaum

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Abstract

A hydrogen-embrittled niobium sample, fractured above the solvus temperature, has been examined using an ion microprobe. Ion images taken with Nb** plus , NbH** plus , H** plus , and NbO** plus ions reveal strong enhancement of the emission of the hydrogen-containing ion species from the walls of the main fracture and from a secondary crack. Comparison of the NbH** plus /Nb** plus ion ratio from the crack walls with that observed from known niobium hydride precipitates demonstrates that the hydrogen-rich phase found on the fracture walls is niobium hydride. The results confirm a postulated mechanism of hydrogen embrittlement by stress-induced precipitation of niobium hydride.

Original languageEnglish (US)
Pages (from-to)964-968
Number of pages5
JournalAnalytical Chemistry
Volume48
Issue number7
Publication statusPublished - Jun 1976
Externally publishedYes

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ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Williams, P., Evans, C. A., Grossbeck, M. L., & Birnbaum, H. K. (1976). ION MICROPROBE ANALYSIS FOR NIOBIUM HYDRIDE IN HYDROGEN-EMBRITTLED NIOBIUM. Analytical Chemistry, 48(7), 964-968.