- Computer Simulation and Verification of Adiabatic Temperature and Apparent Activity Energy of the NiO/Al Aluminothermic System
-
Yuepeng Song, Yanmin Zhu, Dongsheng Gao, Jing Guo, Hyoung Seop Kim
-
J Korean Powder Metall Inst. 2013;20(5):332-337.
-
DOI: https://doi.org/10.4150/KPMI.2013.20.5.332
-
-
166
View
-
0
Download
-
1
Citations
-
 Abstract
 PDF
- Recently, self-propagating high-temperature synthesis (SHS), related to metallic and ceramic powder interactions, has attracted huge interest from more and more researchers, because it can provide an attractive, energy-efficient approach to the synthesis of simple and complex materials. The adiabatic temperature T_ad and apparent activation energy analysis of different thermit systems plays an important role in thermodynamic studies on combustion synthesis. After establishing and verifying a mathematic calculation program for predicting adiabatic temperatures, based on the thermodynamic theory of combustion synthesis systems, the adiabatic temperatures of the NiO/Al aluminothermic system during self-propagating high-temperature synthesis were investigated. The effect of a diluting agent additive fraction on combustion velocity was studied. According to the simulation and experimental results, the apparent activation energy was estimated using the Arrhenius diagram of ln(v/T_ad)sim/T_ad based on the combustion equation given by Merzhanov et al. When the temperature exceeds the boiling point of aluminum (2,790 K), the apparent activation energy of the NiO/Al aluminothermic system is 64pm14 kJ/mol. In contrast, below 2,790 K, the apparent activation energy is 189pm15 kJ/mol. The process of combustion contributed to the mass-transference of aluminum reactant of the burning compacts. The reliability of the simulation results was experimentally verified.
-
Citations
Citations to this article as recorded by  - Milling parameter optimization for the refinement of NiO/Al mixtures and the synthesis of Ni/Al2O3 nanocomposites
N Berramdan, H. Boutefnouchet, M. Zidani, R. Yamanoglu, C. Curfs
Journal of Mining and Metallurgy, Section B: Metallurgy.2024; 60(1): 45. CrossRef
- Tomography-based Finite Element Analysis for the Mechanical Behavior of Porous Titanium Manufactured by a Space Holder Method
-
Dong Jun Lee, Dong-Hyun Ahn, Byounggab Lee, Jiwon Jeong, Sang Ho Oh, Chong Soo Lee, Hyoung Seop Kim
-
J Korean Powder Metall Inst. 2013;20(5):350-354.
-
DOI: https://doi.org/10.4150/KPMI.2013.20.5.350
-
-
203
View
-
1
Download
-
2
Citations
-
Abstract
PDF
- In this study, porous titanium samples were manufactured by space holder methods using two kinds of urea and sodium chloride space holders. Three-dimensional pore structures were obtained by a computed-tomography (CT) technique and utilized for finite element analysis in order to investigate the mechanical properties. The CT-based finite element analyses were in better agreement with the experimental results than unit cell model-based analyses. Both the experimental and CT-based results showed the same tendency that the elastic modulus decreased with increasing the porosities. The total porosity of the bulk body plays a key role in determining the elastic modulus of porous materials.
-
Citations
Citations to this article as recorded by - Effect of track spacing on porosity of metallic foam fabricated by laser melting deposition of Ti6Al4V/TiH2 powder mixture
Ja-Ye Seo, Do-Sik Shim
Vacuum.2018; 154: 200. CrossRef - Additive manufacturing of porous metals using laser melting of Ti6Al4V powder with a foaming agent
Do-Sik Shim, Ja-Ye Seo, Hi-Seak Yoon, Ki-Yong Lee, Wook-Jin Oh
Materials Research Express.2018; 5(8): 086518. CrossRef
- Trend in Research of Powder Consolidation Using Severe Plastic Deformation
-
Eun Yoo Yoon, Dong Jun Lee, Dong-Hyun Ahn, Hyuk Jae Jeong, Hyoung Seop Kim
-
J Korean Powder Metall Inst. 2013;20(2):148-154.
-
DOI: https://doi.org/10.4150/KPMI.2013.20.2.148
-
-
176
View
-
0
Download
-
1
Citations
-
PDF
-
Citations
Citations to this article as recorded by - Analyses of Sever Plastic Deformation Behavior of Hot Isostatic Pressed Ni-base Superalloy during High Pressure Torsion Process
D.J. Lee, Y. Lee, H.-K. Kim, Y.-N. Kwon, H.S. Kim, E.Y. Yoon
Transactions of Materials Processing.2016; 25(4): 254. CrossRef
|
kpmi
