High-resolution neutron powder diffractometer SPODI at research reactor FRM II

Hoelzel, Markus; Senyshyn, Anatoliy; Juenke, Norbert; Boysen, H.; Schmahl, Wolfgang W.; Fueß, H.

doi:10.1016/j.nima.2011.11.070

Cited by 219 publications

(185 citation statements)

References 21 publications

Supporting

Mentioning

182

Contrasting

Unclassified

Order By: Relevance

“…The diffractometers SPODI [7,8], which is equipped with a bank of 80 position sensitive detector tubes, and Stress-Spec [9], equipped with a two-dimensional position sensitive detector, of Heinz Maier-Leibnitz-Zentrum (MLZ) at FRM II, Garching, Germany, were used for ND measurements. SPODI high-resolution neutron powder diffractometer covering the angular range (2θ) up to 154 • was used for precise determination of phase content at RT before in situ heating for all the samples.…”

Section: In-situ Thermal Cycle During Neutron Diffraction Measurementmentioning

confidence: 99%

Additional Phases at High Boron Content in High-Temperature Co–Re–Cr Alloys

Béran

Mukherji

Strunz

et al. 2018

Metals

View full text Add to dashboard Cite

Boron largely increases the ductility of polycrystalline high-temperature Co-Re-Cr alloys. Therefore, the effect of boron addition on the alloy structural characteristics is of large importance for the stability of the alloy at operational temperatures. Along with the Co-solid solution matrix phase transformation from hcp to fcc structure, additional structural effects were observed in situ at very high temperatures (up to 1500 • C) using neutron diffraction (ND) in boron-containing Co-17Re-23Cr alloys. Increasing boron content up to 1000 wt. ppm lowers the temperature at which sublimation of Co and Cr from the matrix occurs. As a result, the composition of the matrix in the surface region is changed leading to the formation of a second and a third matrix hcp phases at high temperatures. The consideration on the lattice parameter dependence on composition was used to identify the new phases appearing at high temperatures. Energy-dispersive spectroscopy and ND results were used to estimate the amount of Co and Cr which sublimated from the surface region of the high-boron sample. In the sense of alloy development, the sublimation of Co and Cr is not critical as the temperature range where it is observed (≥1430 • C) is significantly above the foreseen operation temperature of the alloys (1200 • C).

show abstract

Section: In-situ Thermal Cycle During Neutron Diffraction Measurementmentioning

confidence: 99%

Additional Phases at High Boron Content in High-Temperature Co–Re–Cr Alloys

Béran

Mukherji

Strunz

et al. 2018

Metals

View full text Add to dashboard Cite

show abstract

“…Diffraction data were collected at the ForschungsNeutronenquelle Heinz-Maier-Leibnitz Zentrum (MLZ, Garching) using the high resolution powder diffractometer SPODI (Ge (551) λ = 154.818(2) pm) [19]. For neutron experiments the samples were encapsulated in a vanadium container with 0.15 mm wall thickness and 9 -10 mm inner diameter and mounted in a sample changer.…”

Section: Characterizationmentioning

confidence: 99%

The order-disorder transition in Cu2ZnSnS4 – A neutron scattering investigation

Ritscher

Hoelzel

Lerch

2016

Journal of Solid State Chemistry

Self Cite

View full text Add to dashboard Cite

In this work a series of stoichiometric Cu 2 ZnSnS 4 (CZTS) samples annealed at different temperatures in the range of 473 -623 K were investigated. The temperature dependence of the Cu/Zn-orderdisorder behavior was analyzed by neutron powder diffraction measurements. Cu fully occupies the 2a and Sn the 2b position within the whole temperature range. For Zn and the remaining Cu on sites 2d and 2c, a clear change from ordered to disordered kesterite structure is found. The critical temperature T c for this Landau-type second order transition was determined as 552 ± 2 K. It was found that in Cu 2 ZnSnS 4 very long annealing times are necessary to reach equilibrium at low temperatures.

show abstract

“…Heinz-Maier-Leibnitz Zentrum (MLZ, Garching) using the high resolution powder diffractometer SPODI (Ge (551) λ = 154.831 pm) [22]. For neutron experiments the sample was encapsulated in a vanadium container with 0.15mm wall thickness and 9 mm inner diameter (Ar atmosphere).…”

Section: Characterizationmentioning

confidence: 99%

A mechanochemical route to single phase Cu2ZnSnS4 powder

Ritscher

Just

Dolotko

et al. 2016

Journal of Alloys and Compounds

View full text Add to dashboard Cite

With respect to absorber materials in solar cells, Cu 2 ZnSnS 4 (CZTS) has been a focus of interest in recent years. In this work, a new route leading to single phase CZTS powders is presented. For structural characterization X-ray and neutron powder diffraction measurements were performed. Further structural and compositional analysis of the CZTS powder was carried out by means of X-ray absorption near edge spectroscopy (XANES) and wavelengthdispersive X-ray spectroscopy (WDS). The obtained CZTS powder with an actual composition of Cu 2.00(4) Zn 1.02(2) Sn 0.99(2) S 4.00(8) adopts the kesterite-type structure. A detailed cation distribution analysis using the average neutron scattering length method revealed a partial disorder of copper and zinc on the (2c) and (2d) sites.

show abstract

High-resolution neutron powder diffractometer SPODI at research reactor FRM II

Cited by 219 publications

References 21 publications

Additional Phases at High Boron Content in High-Temperature Co–Re–Cr Alloys

Additional Phases at High Boron Content in High-Temperature Co–Re–Cr Alloys

The order-disorder transition in Cu2ZnSnS4 – A neutron scattering investigation

A mechanochemical route to single phase Cu2ZnSnS4 powder

Contact Info

Product

Resources

About