In situ x-ray diffraction investigation on early stages of oxidation at 900 °C of γ-TiAl dipped in a phosphoric acid solution

2009 ◽  
Vol 106 (10) ◽  
pp. 103502 ◽  
Author(s):  
S. Y. Brou ◽  
P. O. Renault ◽  
C. Huvier ◽  
J. L. Grosseau-Poussard ◽  
G. Bonnet
Keyword(s):  
Phosphoric Acid ◽  
Acid Solution ◽  
Phosphoric Acid Solution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Early Stages

Behaviour of Cement CEM III / B under Acid Solutions Agression (I)

2008 ◽  
Vol 59 (6) ◽  
Author(s):  
Ion Teoreanu ◽  
Alice Pop2 ◽  
Mariana Coarna ◽  
Daniela Natac
Keyword(s):  
Compressive Strength ◽  
Chemical Composition ◽  
Phosphoric Acid ◽  
Acid Solution ◽  
Acid Corrosion ◽  
Point Of View ◽  
Acid Solutions ◽  
X Ray Diffraction ◽  
Cement Pastes ◽  
X Ray

This paper aims at investigating the behaviour of a type CEM III/B cement under acid corrosion with formation of insoluble products. Cement paste and mortar specimens have been cured in sulphuric acid and phosphoric acid solutions. The samples have been kept in water up to 28 days and further 180 days in 0.5 mol/L acid solutions. At specific terms, the samples underwent compressive strength, chemical and X-ray diffraction analysis. The tests� results pointed out significant differences of chemical composition between the corrosion layers and the uncorroded core. The corrosion products formed in each acid solution were identified. In concretes with composite, ecologic cements the corrosion noticed on the cement pastes can be avoided. For that purpose during the preparation of the concretes there have to be achieved a high compactness and, consequently, a high impermeability. The binder matrix of the concrete is therefore, performing from the point of view of the resistance against the acid corrosion.

In situ X-ray diffraction of the early stages of the crystallization of Fe80B20

1993 ◽  
Vol 28 (6) ◽  
pp. 1503-1508 ◽  
Author(s):  
C. Brizard ◽  
B. Rodricks ◽  
E. Alp ◽  
R. Macharrie
Keyword(s):  
X Ray Diffraction ◽  
X Ray ◽  
Early Stages

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

In-situ Investigation of Bainite Formation with fast X-Ray Diffraction (iXRD)

2017 ◽  
Vol 72 (6) ◽  
pp. 355-364
Author(s):  
A. Kopp ◽  
T. Bernthaler ◽  
D. Schmid ◽  
G. Ketzer-Raichle ◽  
G. Schneider
Keyword(s):  
X Ray Diffraction ◽  
X Ray ◽  
In Situ Investigation

Texture Evolution Under Fast Heating and Cooling Rates of Zirconium Alloys Studied In-Situ by Synchrotron X-Ray Diffraction

2020 ◽  
Author(s):  
Chi-Toan Nguyen ◽  
Alistair Garner ◽  
Javier Romero ◽  
Antoine Ambard ◽  
Michael Preuss ◽  
...  
Keyword(s):  
Texture Evolution ◽  
Zirconium Alloys ◽  
X Ray Diffraction ◽  
Fast Heating ◽  
Cooling Rates ◽  
X Ray ◽  
Heating And Cooling

STRUCTURAL EVOLUTION OF EXCEPTIONALLY IRON-DEFICIENT HEMATITE NANOCRYSTALS AS OBSERVED BY IN SITU SYNCHROTRON X-RAY DIFFRACTION

2019 ◽  
Author(s):  
Si Athena Chen ◽  
◽  
Peter Heaney ◽  
Jeffrey E. Post ◽  
Peter J. Eng ◽  
...  
Keyword(s):  
Structural Evolution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Iron Deficient

In situ X-ray diffraction techniques as a powerful tool to study battery electrode materials

2002 ◽  
Vol 47 (19) ◽  
pp. 3137-3149 ◽  
Author(s):  
M. Morcrette ◽  
Y. Chabre ◽  
G. Vaughan ◽  
G. Amatucci ◽  
J.-B. Leriche ◽  
...  
Keyword(s):  
Electrode Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Battery Electrode

scholarly journals In-Situ Synchrotron X-ray Diffraction Investigation of Microstructural Evolutions During Low-Pressure Carburizing

2021 ◽  
Author(s):  
Ogün Baris Tapar ◽  
Jérémy Epp ◽  
Matthias Steinbacher ◽  
Jens Gibmeier
Keyword(s):  
Carbon Content ◽  
Carbon Diffusion ◽  
Low Pressure ◽  
Carbon Accumulation ◽  
Experimental Chamber ◽  
Carbide Formation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbon Supply

AbstractAn experimental heat treatment chamber and control system were developed to perform in-situ X-ray diffraction experiments during low-pressure carburizing (LPC) processes. Results from the experimental chamber and industrial furnace were compared, and it was proven that the built system is reliable for LPC experiments. In-situ X-ray diffraction investigations during LPC treatment were conducted at the German Electron Synchrotron Facility in Hamburg Germany. During the boost steps, carbon accumulation and carbide formation was observed at the surface. These accumulation and carbide formation decelerated the further carbon diffusion from atmosphere to the sample. In the early minutes of the diffusion steps, it is observed that cementite content continue to increase although there is no presence of gas. This effect is attributed to the high carbon accumulation at the surface during boost steps which acts as a carbon supply. During quenching, martensite at higher temperature had a lower c/a ratio than later formed ones. This difference is credited to the early transformation of austenite regions having lower carbon content. Also, it was noticed that the final carbon content dissolved in martensite reduced compared to carbon in austenite before quenching. This reduction was attributed to the auto-tempering effect.

Sign in / Sign up

Export Citation Format

Share Document