Published April 1996
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Evidence of preferential diffusion and segregation of impurities at grain boundaries in very pure niobium used for radiofrequency cavities
Creators
- 1. CEA Centre d'Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d'Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l'Instrumentation Associee
- 2. Laboratoire d'Analyse par Activation Pierre-Sue - Centre d'Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (France)
- 3. Lyon-1 Univ., 69 - Villeurbanne (France). Inst. de Physique Nucleaire
Description
Grain boundaries (GB) of titaniferous, heat treated and then etched niobium have been observed by nuclear microprobe analysis. The very small area of the probe allows to measure by PIXE quantities of titanium as low as one monolayer at the GB. Concentrations of titanium as high as some atomic percent were found on 6 μm etched samples, giving indication of a preferential diffusion and/or segregation at GB. Titanium was detectable also on 15 μm etched samples but was bellow the sensitivity of the microprobe for 35 μm etched samples. (author)
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Additional details
Publishing Information
- Imprint Title
- Research and development on superconducting cavities. The Saclay contribution to the 7. Workshop on RF superconductivity
- Imprint Pagination
- [116 p.].
- Journal Page Range
- p. 69.
- Report number
- CEA-DAPNIA-SEA--96-05
Conference
- Title
- 7. Workshop on RF superconductivity.
- Dates
- 17-20 Oct 1995.
- Place
- Gif-sur-Yvette (France).
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 28040884
- Subject category
- S36: MATERIALS SCIENCE; S43: PARTICLE ACCELERATORS;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ACCELERATION; CAVITY RESONATORS; DIFFUSION; GRAIN BOUNDARIES; HEAT TREATMENTS; IMPURITIES; MICROSTRUCTURE; NIOBIUM; RF SYSTEMS; SEGREGATION
- Descriptors DEC
- CRYSTAL STRUCTURE; ELECTRONIC EQUIPMENT; ELEMENTS; EQUIPMENT; METALS; RESONATORS; TRANSITION ELEMENTS
Optional Information
- Notes
- 3 refs. Submitted to Applied Surface Science (NL).