scholarly journals Metallographic Structure Analysis by 3-Dimensional Neutron Diffraction

2021 ◽  
Vol 63 (4) ◽  
pp. 251-252
Author(s):  
Ryoji KIYANAGI
Keyword(s):  
Neutron Diffraction ◽  
Structure Analysis ◽  
3 Dimensional ◽  
Metallographic Structure

Fault Analysis on Crosshead Fracture of the Reciprocating Piston Compressor C102B

2011 ◽  
Vol 189-193 ◽  
pp. 1188-1193
Author(s):  
Ya Xin Zhang ◽  
Li Juan Chen ◽  
Bin Bin Li
Keyword(s):  
Stress Analysis ◽  
Structure Analysis ◽  
Piston Compressor ◽  
Maximum Load ◽  
Fault Analysis ◽  
Dynamics Analysis ◽  
Methanol Production ◽  
Metallographic Structure

The C102B reciprocating piston compressor is an important equipment widely used in methanol production. Because of the complexity of exact dynamics analysis, the traditional and common way to find the reason of fracture is only based on metallographic structure analysis of crosshead material. In this paper, after metallographic structure analysis of crosshead material of the C102B compressor, the maximum loads on it are also calculated and two dangerous crosshead positions with maximum load are determined. Finally, stress analysis of the crosshead in two dangerous positions is implemented by FEM technology. Based on the above study, the reasons of crosshead fracture of the C102B compressor are found. The results has an inportant significance for judging the resaon of crosshead failure.

Preparation of Large Crystals of Photoactive Yellow Protein for Neutron Diffraction and High Resolution Crystal Structure Analysis†

2007 ◽  
Vol 83 (2) ◽  
pp. 336-338 ◽  
Author(s):  
Shigeo Yamaguchi ◽  
Hironari Kamikubo ◽  
Nobutaka Shimizu ◽  
Yoichi Yamazaki ◽  
Yasushi Imamoto ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Neutron Diffraction ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Photoactive Yellow Protein

Neutron Diffraction Structure Analysis of a Triply-Bridged Binuclear Cobalt Hydride Complex, [(η5-Cp*)Co]2H3

1996 ◽  
Vol 35 (9) ◽  
pp. 2698-2700 ◽  
Author(s):  
Frank Lutz ◽  
Robert Bau ◽  
Ping Wu ◽  
Thomas F. Koetzle ◽  
Carl Krüger ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Structure Analysis ◽  
Hydride Complex ◽  
Diffraction Structure

X-ray and neutron diffraction investigation at 298 K of NH4I · NH3 and ND4I · ND3 containing the cation H3N – H … NH3+ and D3N – D … ND3+

1992 ◽  
Vol 200 (3-4) ◽  
Author(s):  
H. J. Berthold ◽  
E. Vonholdt ◽  
R. Wartchow ◽  
T. Vogt
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Neutron Diffraction ◽  
Single Crystal ◽  
Structure Analysis ◽  
Crystal Structure Analysis ◽  
Single Crystal Structure ◽  
X Ray ◽  
Single Crystal Structure Analysis

AbstractNHA single crystal structure analysis of NThe deuterated compound NThe structures of the ordered low temperature phases will be reported separately.

scholarly journals Magnetic structure analysis of rare earth permanent magnet Sm2Fe17N3

2014 ◽  
Vol 70 (a1) ◽  
pp. C1460-C1460 ◽  
Author(s):  
Kotaro Saito ◽  
Nobuhito Inami ◽  
Yasuo Takeichi ◽  
Tetsuro Ueno ◽  
Ryoko Sagayama ◽  
...  
Keyword(s):  
Rare Earth ◽  
Neutron Diffraction ◽  
Magnetic Structure ◽  
Structure Analysis ◽  
Permanent Magnets ◽  
Nearest Neighbor ◽  
Magnetic Moments ◽  
High Coercivity ◽  
Diffraction Measurement ◽  
Fe Sites

Rare earth intermetallic compound Sm2Fe17N3 exhibits notalble magnetic properties such as high Curie temperature and high coercivity which are very suitable for permanent magnets [1,2]. Although microscopic magnetic structure is one of the basic information for magnetic materials, there is no report about the magnetic structure of Sm2Fe17N3 for our knowledge. This is because samarium's neutron absorption cross section is huge enough to make researchers hesitate to have neutron diffraction experiments of Sm compounds. We have carried out powder neutron diffraction measurement of Sm2Fe17N3 with a straightforward solution to the problem by taking long measurement time. Synchrotron x-ray diffraction measurements with single crystal has also been done to obtain initial crystal structure parameters for magnetic structure analysis and we have succeeded to analyze the magnetic structure of Sm2Fe17N3 at room temperature. Among four Fe sites in the unit cell, while one Fe site which is the nearest neighbor of nitrogen shows smaller magnetic moment than normal iron, two Fe sites show enhancement in their magnetic moments. This phenomenon can be understood as 'cobaltization' of Fe by the adjacent nitrogen through hybridization.

Sign in / Sign up

Export Citation Format

Share Document