In situ observation of x-ray irradiation effect by using a multiwave x-ray diffraction phenomenon

2011 ◽  
Vol 110 (10) ◽  
pp. 102210
Author(s):  
Wataru Yashiro ◽  
Yoshitaka Yoda ◽  
Kazushi Miki ◽  
Toshio Takahashi
Keyword(s):  
In Situ Observation ◽  
Irradiation Effect ◽  
X Ray Diffraction ◽  
X Ray ◽  
Diffraction Phenomenon

scholarly journals In situ observation of phase changes of a silica-supported cobalt catalyst for the Fischer–Tropsch process by the development of a synchrotron-compatible in situ/operando powder X-ray diffraction cell

2018 ◽  
Vol 25 (6) ◽  
pp. 1673-1682 ◽  
Author(s):  
Adam S. Hoffman ◽  
Joseph A. Singh ◽  
Stacey F. Bent ◽  
Simon R. Bare
Keyword(s):  
High Pressure ◽  
Elevated Pressure ◽  
Phase Changes ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
Fischer Tropsch ◽  
X Ray ◽  
And Performance ◽  
Co Nanoparticles

In situ characterization of catalysts gives direct insight into the working state of the material. Here, the design and performance characteristics of a universal in situ synchrotron-compatible X-ray diffraction cell capable of operation at high temperature and high pressure, 1373 K, and 35 bar, respectively, are reported. Its performance is demonstrated by characterizing a cobalt-based catalyst used in a prototypical high-pressure catalytic reaction, the Fischer–Tropsch synthesis, using X-ray diffraction. Cobalt nanoparticles supported on silica were studied in situ during Fischer–Tropsch catalysis using syngas, H2 and CO, at 723 K and 20 bar. Post reaction, the Co nanoparticles were carburized at elevated pressure, demonstrating an increased rate of carburization compared with atmospheric studies.

In-situ observation on the isothermal decomposition process of γ-Fe[N] by X-ray diffraction

2008 ◽  
Vol 202 (12) ◽  
pp. 2638-2643 ◽  
Author(s):  
Zhi-Jun Jiang ◽  
Xiao-Ling Li ◽  
Jian-Feng Gu ◽  
Ming-Juan Hu ◽  
Zu-Chang Zhu
Keyword(s):  
Decomposition Process ◽  
In Situ Observation ◽  
Isothermal Decomposition ◽  
X Ray Diffraction ◽  
X Ray

In situ observation of anodic dissolution process of p-GaAs(001) in HCl solution by surface X-ray diffraction

1997 ◽  
Vol 429 (1-2) ◽  
pp. 13-17 ◽  
Author(s):  
Kohei Uosaki ◽  
Michio Koinuma ◽  
Toshihiro Kondo ◽  
Shen Ye ◽  
Ichizo Yagi ◽  
...  
Keyword(s):  
Anodic Dissolution ◽  
Dissolution Process ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hcl Solution

In situ observation of the formation of (Bi, Pb)2Sr2Ca2Cu3O10+x(110 K) using high-temperature X-ray diffraction

1995 ◽  
Vol 8 (4) ◽  
pp. 234-237 ◽  
Author(s):  
G M Zorn ◽  
R Hornung ◽  
H E Gobel ◽  
B Seebacher ◽  
H W Neumuller ◽  
...  
Keyword(s):  
High Temperature ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
X Ray

In Situ Observation of Crystal Grain Orientation During Scuffing Process of Steel Surface Using Synchrotron X-ray Diffraction

2020 ◽  
Vol 68 (4) ◽  
Author(s):  
K. Yagi ◽  
T. Izumi ◽  
J. Koyamachi ◽  
S. Sanda ◽  
S. Yamaguchi ◽  
...  
Keyword(s):  
Grain Orientation ◽  
Steel Surface ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals The In Situ Observation of Phase Transformations During Intercritical Annealing of a Medium Manganese Advanced High Strength Steel by High Energy X-Ray Diffraction

2021 ◽  
Vol 8 ◽  
Author(s):  
Xiaohua Hu ◽  
Josh J. Mueller ◽  
Xin Sun ◽  
Emmanuel De Moor ◽  
John G. Speer ◽  
...  
Keyword(s):  
Intercritical Annealing ◽  
Isothermal Holding ◽  
High Energy ◽  
Manganese Steel ◽  
Temperature Deformation ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
Equilibrium Conditions ◽  
X Ray

Microstructural changes during thermal processing of a medium manganese steel containing (in wt%) 0.19C and 4.39 Mn were evaluated in situ with a high energy X-ray diffraction system (HEXRD). Samples with an initial fully martensitic microstructure were heated to intercritical annealing (IA) temperatures of 600 or 650°C, held for 30 min, and cooled to room temperature. Diffraction data were analyzed to determine the variations in austenite and ferrite phase fractions and phase lattice constants throughout the ICA cycles. On heating, the 2 vol. pct of austenite present in the starting microstructure decomposed, and cementite precipitation then occurred. During isothermal holding, the austenite fraction increased, up to 20% for the sample annealed at 650°C. The measured austenite fractions were less than those calculated by Thermo-Calc for equilibrium conditions, indicating that the 30-min hold time was insufficient to achieve near-equilibrium conditions. Observed changes in lattice parameters during isothermal holding were interpreted to reflect composition changes due to redistribution of the C and Mn between austenite and ferrite. The results are discussed in relation to the potential for controlling austenite stability during ambient temperature deformation.

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