Ion Microprobe Analysis for Niobium Hydride in Hydrogen Embrittled Niobium.
Abstract
Hydrogen embrittled niobium samples have been examined in an ion microprobe to verify the mechanism of embrittlement by stress induced precipitation of hydride. A fractured Nb-2 at.% H sample was examined in detail. Mass analyzed images of the fracture region of the sample were obtained using Nb(+), NbH(+), H(+), and NbO(+) ions. The images clearly demonstrate the presence of a hydrogen-rich phase at the fracture site. NbH(+)/Nb(+) ratios at the fracture site and away from it appear characteristic of niobium hydride and Nb-H solid solution respectively. Scanning electron microscope and electron diffraction studies together with the ion microprobe analysis provide strong evidence in support of the theory of hydrogen embrittlement by stress-induced precipitation of niobium hydride.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1975
- Accession Number
- ADA010548
Entities
People
- Charles A. Evans Jr.
- Howard K. Birnbaum
- Martin L. Grossbeck
- Peter Williams
Organizations
- University of Illinois Urbana–Champaign