scholarly journals Transformation Mechanism of Ore Matter in the Weathering

2012 ◽  
Vol 01 (03) ◽  
pp. 65-68
Author(s):  
Victor Bragin ◽  
Irina Baksheyeva ◽  
Margaret Sviridova
Keyword(s):  
Transformation Mechanism

Diffusional-displacive transformation mechanism for the β1 precipitate in a model Mg-rare-earth alloy

2021 ◽  
Vol 174 ◽  
pp. 111018
Author(s):  
Hongbo Xie ◽  
Xiaobo Zhao ◽  
Jingchun Jiang ◽  
Junyuan Bai ◽  
Shanshan Li ◽  
...  
Keyword(s):  
Rare Earth ◽  
Transformation Mechanism ◽  
Rare Earth Alloy ◽  
Displacive Transformation

scholarly journals Insights into antimicrobial agent sulfacetamide transformation during chlorination disinfection process in aquaculture water

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14746-14754
Author(s):  
Yaoguang Guo ◽  
Zhiyuan Liu ◽  
Xiaoyi Lou ◽  
Changling Fang ◽  
Pu Wang ◽  
...  
Keyword(s):  
Antimicrobial Agent ◽  
Systematic Study ◽  
Degradation Kinetics ◽  
Transformation Mechanism ◽  
Chlorination Process ◽  
Disinfection Process ◽  
Potential Formation ◽  
Aquaculture Water

A systematic study for degradation kinetics and transformation mechanism of sulfacetamide antibiotic, and the potential formation of H-DBPs represented by HAAs in the chlorination process is explored.

In-Situ Study of Ti/TiN Stability under Nitrogen Anneal

1999 ◽  
Vol 564 ◽  
Author(s):  
P. W. DeHaven ◽  
K. P. Rodbell ◽  
L. Gignac
Keyword(s):  
Annealing Temperature ◽  
Time Range ◽  
Second Phase ◽  
Transformation Rate ◽  
Transformation Mechanism ◽  
Second Stage ◽  
Transmission Electron ◽  
Reaction Proceeds ◽  
Two Stages

AbstractThe effectiveness of a TiN capping layer to prevent the conversion of α-titantium to titanium nitride when annealed in a nitrogen ambient has been studied over the temperature range 300–700°C using in-situ high temperature diffraction and transmission electron microscopy. Over the time range of interest (four hours), no evidence of Ti reaction was observed at 300°C. At 450°C. nitrogen was found to diffuse into the Ti to form a Ti(N) solid solution. Above 500°C the titanium is transformed to a second phase: however this reaction follows two different kinetic paths, depending on the annealing temperature. Below 600°C. the reaction proceeds in two stages, with the first stage consisting of Ti(N) formation, and the second stage consisting of the conversion of the Ti(N) with a transformation mechanism characteristic of short range diffusion (grain edge nucleation). Above 600°C, a simple linear transformation rate is observed.

scholarly journals Transformation mechanism of amorphous calcium carbonate into calcite in the sea urchin larval spicule

2008 ◽  
Vol 105 (45) ◽  
pp. 17362-17366 ◽  
Author(s):  
Y. Politi ◽  
R. A. Metzler ◽  
M. Abrecht ◽  
B. Gilbert ◽  
F. H. Wilt ◽  
...  
Keyword(s):  
Calcium Carbonate ◽  
Sea Urchin ◽  
Amorphous Calcium Carbonate ◽  
Transformation Mechanism

Cementite Precipitation of a H21 Tool Steel after Hot Compression and Double Temper

2014 ◽  
Vol 1043 ◽  
pp. 154-158
Author(s):  
Meilinda Nurbanasari ◽  
Panos Tsakiropoulos ◽  
Eric J. Palmiere
Keyword(s):  
High Temperature ◽  
Applied Stress ◽  
Tool Steel ◽  
Hot Deformation ◽  
Lower Bainite ◽  
Precipitation Behavior ◽  
Transformation Mechanism ◽  
Tempered Martensite ◽  
Bainite Transformation ◽  
Precipitation Behaviour

The cementite precipitation behavior in the martensite and banite of the H21 tool steel under high temperature axisymmetric compression test and double temper was investigated. The main purpose on this work is to develop a better understanding regarding the transformation mechanism of bainite and martensite in a H21 tool steel. The selected deformation temperatures were 1100 oC and 1000 oC and the double temper process was carried out at 650 oC for 1 hour respectively. The results showed that the cementite was sensitive to the stress. The applied stress has affected the Fe3C precipitation behaviour by decreasing the number of variants carbides in tempered martensite and decreasing the number of a single variant carbides in tempered lower bainite. The results were in agreement with a displacive mechanism of martensite and bainite transformation. It was also found that hot deformation temperatures selected in this work have the same contribution in decreasing number of variant carbides in tempered martensite and decreasing number of single variant carbides occurred in tempered lower bainite.

Sign in / Sign up

Export Citation Format

Share Document