Ion microprobe analysis for niobium hydride in hydrogen-embrittled niobium

Journal Article · Tue Jun 01 04:00:00 EDT 1976 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac60371a017· OSTI ID:7347947

Williams, P; Evans, Jr, C A; Grossbeck, M L; Birnbaum, H K

A hydrogen-embrittled niobium sample, fractured above the solvus temperature, has been examined using an ion microprobe. Ion images taken with Nb/sup +/, NbH/sup +/, H/sup +/, and NbO/sup +/ 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/sup +//Nb/sup +/ 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.

• OSTI ID: 7347947
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 48:7; ISSN ANCHA
• Country of Publication: United States
• Language: English

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CHEMICAL ANALYSIS
CRYOGENIC FLUIDS
DEUTERIUM
ELEMENTS
EMBRITTLEMENT
FLUIDS
HYDRIDES
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
ION MICROPROBE ANALYSIS
ISOTOPE EFFECTS
ISOTOPES
KINETICS
LIGHT NUCLEI
MASS SPECTRA
METALLURGICAL EFFECTS
METALS
NIOBIUM
NIOBIUM COMPOUNDS
NIOBIUM HYDRIDES
NONDESTRUCTIVE ANALYSIS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
REACTION KINETICS
REFRACTORY METALS
SPECTRA
STABLE ISOTOPES
THERMONUCLEAR REACTOR WALLS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS