Thermodynamic and Experimental Analyses of the Carbothermic Reduction of Tungsten Slag

JOM ◽  
2021 ◽  
Author(s):  
Chunfa Liao ◽  
Sui Xie ◽  
Xu Wang ◽  
Baojun Zhao ◽  
Boqing Cai ◽  
...  
Keyword(s):  
Carbothermic Reduction ◽  
Experimental Analyses

ONSET AND CRACK PROPAGATION OF COMPOSITE STRUCTURES: NUMERICAL AND EXPERIMENTAL ANALYSES

2019 ◽  
Author(s):  
Marcus Angelo ◽  
Marcelo Leite Ribeiro ◽  
Fernando Madureira ◽  
Volnei Tita
Keyword(s):  
Crack Propagation ◽  
Composite Structures ◽  
Experimental Analyses

scholarly journals Carbothermic Reduction and Nitridation Mechanism of Vanadium-Bearing Titanomagnetite Concentrate

Minerals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 730
Author(s):  
Wen Yu ◽  
Xiaojin Wen ◽  
Wei Liu ◽  
Jiangan Chen
Keyword(s):  
Phase Transformation ◽  
Carbothermic Reduction ◽  
Titanium Oxides ◽  
Distribution Characteristic ◽  
Reaction Behavior ◽  
Microstructure Transformation ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Roasting Process ◽  
Rate Limiting

In this study, the carbothermic reduction and nitridation mechanism of vanadium-bearing titanomagnetite concentrate are investigated in terms of phase transformation, microstructure transformation, and thermodynamic analyses. The differences in the reaction behavior of titanomagnetite and ilmenite in vanadium-bearing titanomagnetite concentrate, as well as the distribution characteristic of V in the roasted products, are emphatically studied. It is observed that the reaction sequences of titanomagnetite and ilmenite transformations into nitride are as follows: Fe3−xTixO4→Fe2TiO4→FeTiO3→M3O5→(Ti, V)(N, C); FeTiO3→M3O5→Ti(N, C). The reduction of M3O5 to TiN is the rate-limiting step of the entire reaction, and metal iron is an important medium for transferring C for the reduction of M3O5. Titanomagnetite is faster to convert into nitride than ilmenite is, and the reasons for this are discussed in detail. During the entire roasting process, V mainly coexists with Ti and seems to facilitate the conversion of titanium oxides into (Ti, V)(N, C).

scholarly journals Direct carbothermic reduction of ilmenite concentrates by adding high dosage of Na2CO3 in microwave field

2021 ◽  
Vol 31 (6) ◽  
pp. 1818-1827
Author(s):  
Zhi-gang YU ◽  
Jing-wu XIAO ◽  
Hai-yan LENG ◽  
Kuo-chih CHOU
Keyword(s):  
Carbothermic Reduction ◽  
Microwave Field

Theoretical and experimental analyses of the internal leakage in single-screw expanders

2018 ◽  
Vol 86 ◽  
pp. 273-281 ◽  
Author(s):  
Lili Shen ◽  
Wei Wang ◽  
Yuting Wu ◽  
Liang Cheng ◽  
Biao Lei ◽  
...  
Keyword(s):  
Single Screw ◽  
Experimental Analyses

Plasma Carbothermic Reduction of Rare-Earth Metals

2018 ◽  
Vol 2018 (6) ◽  
pp. 507-512
Author(s):  
V. S. Cherednichenko ◽  
A. S. An’shakov ◽  
V. A. Serikov ◽  
V. A. Faleev
Keyword(s):  
Rare Earth ◽  
Carbothermic Reduction ◽  
Rare Earth Metals

Achieving High Flatness of Workpiece Edge Shape by Considering Polishing Pressure

2010 ◽  
Vol 447-448 ◽  
pp. 71-75
Author(s):  
Takahiro Miyake ◽  
Toshiyuki Enomoto
Keyword(s):  
Semiconductor Devices ◽  
Silicon Wafers ◽  
Polishing Process ◽  
Model Based ◽  
Polishing Pad ◽  
Experimental Analyses ◽  
Polishing Pads ◽  
Polishing Pressure

In recent years, the achievement of further high flatness of workpiece edge shape is strongly required in mirror finishing. Especially, the edge roll off of silicon wafers as the substrates of semiconductor devices is demanded to decrease in the polishing process for raising the yield of IC chips. Many theoretical and experimental analyses for the edge roll off generation have been already done to meet the demand. The analyses, however, cannot fully account for the obtained edge shape in actual polishing. Concretely, the influence of the polishing pressure as one of the key polishing conditions on the edge roll off has not been clarified. In this study, the influence of the polishing pressure on the edge shape was investigated by the polishing experiments and the edge roll off generation analyses using the model based on the viscoelasticity of the polishing pad, which was proposed in the previous study. And it was revealed that an appropriate polishing pressure is needed to be set for achieving high flatness of workpiece edge shape with the consideration of the properties of applied polishing pads.

scholarly journals Numerical and Experimental Analyses on the Temperature Distribution in the Dental Implant Preparation Area when Using a Surgical Guide

2016 ◽  
Vol 27 (1) ◽  
pp. 42-51 ◽  
Author(s):  
Yun-feng Liu ◽  
Jian-lei Wu ◽  
Jian-xing Zhang ◽  
Wei Peng ◽  
Wen-qing Liao
Keyword(s):  
Temperature Distribution ◽  
Dental Implant ◽  
Surgical Guide ◽  
Experimental Analyses
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