Journal of Powder Materials

In-Jin Shon

6 Articles

Mechanical Properties and Fabrication of TiAl Alloy by Pulsed Current Activated Sintering: Song-Lee Du, Na-Ri Kim, Won-Baek Kim, Sung-Wook Cho, In-Jin Shon; J Korean Powder Metall Inst. 2010;17(5):373-378.; DOI: https://doi.org/10.4150/KPMI.2010.17.5.373

Abstract PDF: Nanostuctured TiAl powder was synthesized by high energy ball milling. A dense nanostuctured TiAl was consolidated using pulsed current activated sintering method within 2 minutes from mechanically synthesized powders of TiAl and horizontally milled powders of Ti+Al. The grain size and hardness of TiAl sintered from horizontally milled Ti+Al powders and high energy ball milled TiAl powder were 35 nm, 20 nm and 450 kg/mm2, 630 kg/mm2, respectively.

Fabrication of 4.25 Co_0.53Fe_0.47-Al₂O₃ Composite by High Frequency Induction Heated Combustion Synthesis: Na-Ra Park, Hoon NamKung, In-Yong Ko, In-Jin Shon; J Korean Powder Metall Inst. 2009;16(2):91-97.; DOI: https://doi.org/10.4150/KPMI.2009.16.2.091

Abstract PDF: Nanopowders of Co_3O_4 and FeAl were fabricated by high energy ball milling. Dense 4.25 Co_0.53Fe_0.47-Al_2O_3 composite was simultaneously synthesized and consolidated by high frequency induction heated combustion method within 2 min from mechanically activated powders. Consolidation was accomplished under the combined effects of a induced current and mechanical pressure of 80 MPa.

Mechanical Properties and Fabrication of Nanostructured ReSi_1.75 by High Frequency Induction Heated Combustion Synthesis: Byung-Ryang Kim, Su-Chul Kim, In-Jin Shon; J Korean Powder Metall Inst. 2009;16(1):16-21.; DOI: https://doi.org/10.4150/KPMI.2009.16.1.016

Abstract PDF: Nanostructured ReSi_1.75 was synthesized to have high density via rapid and cost effective process named as high-frequency induction heated combustion synthesis(HFIHCS) method. For the process, mechanically activated Re-Si powder was used, which had been prepared by mechanical ball milling of Re and Si powders with mixing ratio of 1:1.75. Both combustion synthesis and densification were accomplished simultaneously by applying electric current and mechanical pressure of 80 MPa during the process. The average grain size, hardness, and fracture toughness of the compound were 210 nm, 1085 kg/mm2 and 4 MPacdotm1/2, respectively. The experimental results show that HFIHCS is a promising process for synthesis of nanostructured ReSi_1.75 which has a potential for both high temperature and thermo-electric applications.

High-Frequency Induction-Heated Combustion Synthesis and Consolidation of Nanostructured NbSi₂ from Mechanically Activated Powders: Byung-Ryang Kim, Jin-Kook Yoon, Kee-Seok Nam, In-Jin Shon; J Korean Powder Metall Inst. 2008;15(4):279-284.; DOI: https://doi.org/10.4150/KPMI.2008.15.4.279

Abstract PDF: Dense nanostructured NbSi_2 was synthesized by high-frequency induction-heated combustion synthesis (HFIHCS) method within 1 minute in one step from mechanically activated Nb and Si powders. Highly dense NbSi_2 with relative density of up to 99% was simultaneously synthesized and consolidated under the combined effects of an induced current and mechanical pressure of 60 MPa. The average grain size and mechanical properties (hardness and fracture toughness) of the compound were investigated.

Mechanical Properties and Fabrication of Nanostructured 2MoSi₂-SiC by Pulsed Current Activated Combustion Synthesis: In-Jin Shon, Dong-Ki Kim, In-Kyoon Jeong, Jung-Mann Doh, Jin-Kook Yoon, In-Yong Ko; J Korean Powder Metall Inst. 2007;14(4):245-250.; DOI: https://doi.org/10.4150/KPMI.2007.14.4.245

Abstract PDF: Dense nanostructured 2MoSi_2-SiC composites were synthesized by the pulsed current activated combustion synthesis (PCACS) method within 3 minutes in one step from mechanically activated powders of Mo_2C and 5Si. Simultaneous combustion synthesis and densification were accomplished under the combined effects of a pulsed current and mechanical pressure. Highly dense 2MoSi_2-SiC with relative density of up to 96% was produced under simultaneous application of a 60 MPa pressure and the pulsed current. The average grain size of MoSi_2 and SiC were about 120 nm and 90 nm, respectively. The hardness and fracture toughness values obtained were 1350 kg/mm2 and 4 MPacdotm1/2, respectively.

Fabrication and Mechanical Properties of Dense WSi₂-20vol.%SiC Composite by High-Frequency Induction-Heated Combustion Synthesis: Dong-Young Oh, Hwan-Cheol Kim, Sang-Kwon Lee, In-Jin Shon; J Korean Powder Metall Inst. 2005;12(1):17-23.; DOI: https://doi.org/10.4150/KPMI.2005.12.1.017

Abstract PDF: Dense WSi_2-20vol.%SiC composite was synthesized by high-frequency induction-heated combustion synthesis(HFIHCS) method within 2 minutes in one step from elemental powder mixture of W, Si and C. Simultaneous combustion synthesis and densification were accomplished under the combined effects of an induced current and mechanical pressure. Highly dense WSi_2-20vol.%SiC with relative density of up to 97% was produced under simultaneous application of 60MPa pressure and the induced current. The average grain size of WSi_2 was about 5.2µm. The hardness and fracture toughness values obtained were 1700kg/mm2 and 4.4MPacdotm1/2, respectively.

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