Journal of Powder Materials

Sangsun Yang

4 Articles

The Effect of Binder Content for the Pore Properties of Fe Foam Fabricated by Slurry Coating Process: Jin Ho Choi, Sangsun Yang, Yang-Do Kim, Jung-Yeul Yun; J Powder Mater. 2013;20(6):439-444.; DOI: https://doi.org/10.4150/KPMI.2013.20.6.439

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Fe foam with above 90% porosity and 2 millimeter pore size was successfully fabricated by a slurry coating process. In this study, the binder contents were controlled to produce the Fe foam with different pore size, strut thickness and porosity. Firstly, the slurry was prepared by uniform mixing with Fe powders, distilled water and polyvinyl alcohol(PVA) as initial materials. After slurry coating on the polyurethane(PU) foam the sample was dried at 80°C. The PVA and PU foams were then removed by heating at 700°C for 3 hours. The debinded samples were subsequently sintered at 1250°C with holding time of 3 hours under hydrogen atmosphere. The three dimensional geometries of the obtained Fe foams with open cell structure were investigated using X-ray micro CT(computed tomography) as well as the pore morphology, size and phase.

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Interfacial Bonding and Abrasive Wear Behavior of Iron Matrix Composite Reinforced by Ceramic Particles
Yefei Li, Cong Li, Shuli Tang, Qiaoling Zheng, Juan Wang, Zhibo Zhang, Zhicheng Wang
Materials.2019; 12(22): 3646. CrossRef
A Fatigue Fracture Study on TDCB Aluminum Foam Specimen of Type Mode III Bonded with Adhesive
J.H. Lee, J.U. Cho
Archives of Metallurgy and Materials.2017; 62(2): 1359. CrossRef
Torsion Property of the Structure Bonded Aluminum Foam Due to Impact
G.W. Hwang, J.U. Cho
Archives of Metallurgy and Materials.2017; 62(2): 1353. CrossRef
Experimental Study On Fracture Property Of Double Cantilever Beam Specimen With Aluminum Foam
Y.C. Kim, H.K. Choi, J.U. Cho
Archives of Metallurgy and Materials.2015; 60(2): 1151. CrossRef
Experimental Study On Fracture Property Of Tapered Double Cantilever Beam Specimen With Aluminum Foam
Y.C. Kim, S.S. Kim, J.U. Cho
Archives of Metallurgy and Materials.2015; 60(2): 1459. CrossRef
The Effect of Fe and Fe2O3Powder Mixing Ratios on the Pore Properties of Fe Foam Fabricated by a Slurry Coating Process
Jin Ho Choi, Eun-Mi Jeong, Dahee Park, Sangsun Yang, Yoo-Dong Hahn, Jung-Yeul Yun
Journal of Korean Powder Metallurgy Institute.2014; 21(4): 266. CrossRef

Preparation of Metal Injection Molded Dental Components using Spheroidized Ti Powders by Plasma Process: Ji-Na Gwak, Sangsun Yang, Jung-Yeul Yun, Ju-Yong Kim, Seongjin Park, Hyun-Seung Kim, Yong-Jin Kim, Yong-Ho Park; J Powder Mater. 2013;20(6):467-473.; DOI: https://doi.org/10.4150/KPMI.2013.20.6.467

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This research presents a preparation method of dental components by metal injection molding process (MIM process) using titanium scrap. About 20µm sized spherical titanium powders for MIM process were successfully prepared by a novel dehydrogenation and spheroidization method using in-situ radio frequency thermal plasma treatment. The effects of MIM process parameters on the mechanical and biological properties of dental components were investigated and the optimum condition was obtained. After sintering at 1250°C for 1 hour in vacuum, the hardness and the tensile strength of MIMed titanium components were 289 Hv and 584 MPa, respectively. Prepared titanium dental components were not cytotoxic and they showed a good cell proliferation property.

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Effect of Heat Treatment Temperature and Atmosphere on the Microstructure of TiH2-WO3 Powder Mixtures
Han-Eol Lee, Yeon Su Kim, Sung-Tag Oh
Journal of Korean Powder Metallurgy Institute.2017; 24(1): 41. CrossRef
Characterization Of The Graded Microstructure In Powder Sintered Porous Titanium
J.-J. Oak, J.I. Bang, K.-C. Bae, Y.H. Kim, Y.-C. Lee, H.H. Chun, Y.H. Park
Archives of Metallurgy and Materials.2015; 60(2): 1265. CrossRef

Influence of Particle Size Distribution on Green and Sintered Properties of Fe-Cr-Mo Prealloy Powder: Ki-Bong Kim, Sangsun Yang, Yong-Jin Kim, Yong-Ho Park; J Powder Mater. 2013;20(1):7-12.; DOI: https://doi.org/10.4150/KPMI.2013.20.1.007

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The effect of particle size distribution on green and sintered properties of Fe-Cr-Mo prealloy powder was investigated in this study. For the study, prealloyed Fe-Cr-Mo powders with different particle sizes were mixed as various ratios and cold compacted at various pressure and sintered at 1250°C for 30 min, 90%N_2+10%H_2 atmosphere in the continuous sintering furnace. The results shows that the powders with large particle size distribution have high compressibility and low ejection force. However the green strength are much less than those with small particle size distribution. Tensile prperties of the sintered specimes with large particles size also have high strength and elongation.

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The Effects of MoS2Addition on the Mechanical Properties of Fe-Cr-Mn-C-V P/M Alloy
Geon-Hong Kim, Hyun Seok Yang, Man-Sik Kong
Journal of Korean Powder Metallurgy Institute.2014; 21(4): 294. CrossRef
Investigation on the Sintering Behavior and Mechanical Properties of Al-Zn-Mg Alloy Powders Mixed with Al-Si-SiC Composite Powders
Gwang-Joo Jang, Kyung Tae Kim, Sangsun Yang, Yong-Jin Kim, Yong-Ho Park
Journal of Korean Powder Metallurgy Institute.2014; 21(6): 460. CrossRef

Oxidation Study on the Fabrication of Fe-36Ni Oxide Powder from Its Scrap: Jung Yeul Yun, Man Ho Park, Sangsun Yang, Dong-Won Lee, Jei-Pil Wang; J Powder Mater. 2013;20(1):48-52.; DOI: https://doi.org/10.4150/KPMI.2013.20.1.048

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Abstract PDF: A study of oxidation kinetic of Fe-36Ni alloy has been investigated using thermogravimetric apparatus (TGA) in an attempt to define the basic mechanism over a range of temperature of 400 to 1000°C and finally to fabricate its powder. The oxidation rate was increased with increasing temperature and oxidation behavior of the alloy followed a parabolic rate law at elevated temperature. Temperature dependence of the reaction rate was determined with Arrhenius-type equation and activation energy was calculated to be 106.49 kJ/mol. Based on the kinetic data and micro-structure examination, oxidation mechanism was revealed that iron ions and electrons might migrate outward along grain boundaries and oxygen anion diffused inward through a spinel structure, (Ni,Fe)_3O_4.

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