Ion Microprobe Analysis for Niobium Hydride in Hydrogen-Embrittled Niobium

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

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


A hydrogen-embrittled niobium sample, fractured above the solvus temperature, has been examined using an ion microprobe. Ion images taken with Nb+, NbH+, H+, and NbO+ 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+/Nb+ 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
Issue number7
StatePublished - Jun 1 1976
Externally publishedYes

ASJC Scopus subject areas

  • Analytical Chemistry


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