Properties and Rapid Consolidation of Nanostructured Fe3Al Compound by High Frequency Induction Heating

2010 ◽  
Vol 123-125 ◽  
pp. 759-762
Author(s):  
In Jin Shon ◽  
Tae Wan Kim ◽  
Jung Mann Doh ◽  
Jin Kook Yoon ◽  
Kwon Il Na ◽  
...  
Keyword(s):  
High Frequency ◽  
High Energy ◽  
Sintering Behavior ◽  
Combined Effects ◽  
Induced Current ◽  
Mechanical Pressure ◽  
Rapid Sintering ◽  
Energy Ball ◽  
Sintering Method ◽  
High Frequency Induction

A dense nanostuctured Fe3Al was consolidated by high frequency induction heated sintering method within 2 minutes from mechanically synthesized powders of Fe3Al and milled powders of 3Fe+Al. The consolidation was accomplished under the combined effects of a induced current and mechanical pressure. The grain size, sintering behavior and hardness of Fe3Al sintered from horizontally milled Fe+Al powders and high energy ball milled Fe3Al powder were compared. Keywords: Combustion synthesis; Nanomaterials; Mechanical properties; Rapid sintering

Consolidation and Mechanical Properties of Nanostructured SiC from Mechanically Activated Powder by High-Frequency Induction-Heated Sintering

2010 ◽  
Vol 123-125 ◽  
pp. 635-638
Author(s):  
In Jin Shon ◽  
Hyun Su Kang ◽  
Na Ra Park ◽  
In Yong Ko
Keyword(s):  
Mechanical Properties ◽  
High Frequency ◽  
Sintering Behavior ◽  
Hard Material ◽  
Induced Current ◽  
Sintering Process ◽  
Simultaneous Application ◽  
Hard Materials ◽  
Rapid Sintering ◽  
High Frequency Induction

The rapid sintering of nanostuctured SiC hard materials was investigated with high-frequency induction heating sintering process. The advantage of this process is that it allows very quick densification to near theoretical density and prohibition of grain growth in nanostuctured materials. A dense nanostructured SiC hard material was produced with simultaneous application of 500 MPa pressure and induced current within 2 minutes. The effect of the ball milling times on the sintering behavior, grain size and mechanical properties of binderless SiC was investigated.

One Step Synthesis and Consolidation of Nanostructured ZrSi2-SiC Composite and its Mechanical Properties

2007 ◽  
Vol 124-126 ◽  
pp. 1149-1152
Author(s):  
In Jin Shon ◽  
Hyun Kuk Park ◽  
In Yong Ko ◽  
Jin Kook Yoon ◽  
Kyung Tae Hong
Keyword(s):  
Mechanical Properties ◽  
Combustion Synthesis ◽  
High Frequency ◽  
Combined Effects ◽  
Induced Current ◽  
Mechanical Pressure ◽  
Simultaneous Application ◽  
Average Grain Size ◽  
One Step ◽  
High Frequency Induction

Dense nanostructured ZrSi2-SiC composite was synthesized by high frequency induction heated combustion synthesis (HFIHCS) method within 1 minute in one step from powders of ZrC and 3Si. Simultaneous combustion synthesis and densification were accomplished under the combined effects of an induced current and mechanical pressure. Highly dense ZrSi2-SiC with relative density of up to 98% were produced under simultaneous application of a 60MPa pressure and the induced current. The average grain size and mechanical properties (hardness and fracture toughness) of the composite were investigated.

Fabrication of Nanocrystalline TaSi2-SiC Composite by High Frequency Induction Heated Combustion Synthesis and Its Mechanical Properties.

2007 ◽  
Vol 534-536 ◽  
pp. 525-528 ◽  
Author(s):  
In Jin Shon ◽  
Dong Ki Kim ◽  
In Yong Ko ◽  
Jin Kook Yoon ◽  
Kyung Tae Hong
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Combustion Synthesis ◽  
High Frequency ◽  
Single Step ◽  
Combined Effects ◽  
Induced Current ◽  
Mechanical Pressure ◽  
Average Grain Size ◽  
High Frequency Induction

By the high frequency induction heated combustion synthesis (HFIHCS) method, dense nanostructured TaSi2-SiC composite was synthesized within 2 minutes and in a single step from powders of TaC and 3Si. Simultaneous combustion synthesis and densification were accomplished under the combined effects of an induced current and mechanical pressure. Highly dense TaSi2-SiC with relative density of up to 97% were produced under a 60MPa pressure and induced current. The average grain size and mechanical properties (hardness and fracture toughness) of the composite were investigated.

scholarly journals Mechanochemical Synthesis and Rapid Consolidation of Nanocrystalline 3NiAl-Al2O3Composites

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
In-Jin Shon ◽  
In-Yong Ko ◽  
Seung-Hoon Jo ◽  
Jung-Mann Doh ◽  
Jin-Kook Yoon ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Mechanochemical Synthesis ◽  
High Frequency ◽  
Nanocrystalline Materials ◽  
Physical And Mechanical Properties ◽  
High Energy ◽  
Reinforced Composite ◽  
Energy Ball ◽  
High Frequency Induction

Nanopowders of 3NiAl and Al2O3were synthesized from 3NiO and 5Al powders by high-energy ball milling. Nanocrystalline Al2O3reinforced composite was consolidated by high-frequency induction-heated sintering within 3 minutes from mechanochemically synthesized powders of Al2O3and 3NiAl. The advantage of this process is that it allows very quick densification to near theoretical density and inhibition grain growth. Nanocrystalline materials have received much attention as advanced engineering materials with improved physical and mechanical properties. The relative density of the composite was 97%. The average Vickers hardness and fracture toughness values obtained were 804 kg/mm2and 7.5 MPa⋅m1/2, respectively.

Simultaneous Synthesis and Consolidation of Nanostructured ZrB2–ZrO2 Composite

2020 ◽  
Vol 20 (7) ◽  
pp. 4349-4352
Author(s):  
Seong-Eun Kim ◽  
Jin-Kook Yoon ◽  
In-Jin Shon
Keyword(s):  
Mechanical Properties ◽  
Combustion Synthesis ◽  
High Frequency ◽  
Combined Effects ◽  
Induced Current ◽  
Mechanical Pressure ◽  
Simultaneous Application ◽  
Average Grain Size ◽  
One Step ◽  
Simultaneous Synthesis

A dense nanostructured 2ZrB2–ZrO2 composite was synthesized by the high-frequency inductionheated combustion synthesis (HFIHCS) method within 2 min in one step from mechanically activated powders of 2B2O3 and 3Zr. Simultaneous combustion synthesis and densification were accomplished under the combined effects of the induced current and mechanical pressure. A highly dense 2ZrB2–ZrO2 composite with relative density of up to 95.5% was produced under the simultaneous application of a pressure of 80 MPa and the induced current. The average grain size and mechanical properties (hardness and fracture toughness) of the composite were investigated.

The Effect of Holding Time on the Mechanical Properties and Microstructure of Sintered NbC Composite

2010 ◽  
Vol 123-125 ◽  
pp. 803-806
Author(s):  
Duck Soo Kang ◽  
Kee Do Woo ◽  
Sang Hyuk Kim ◽  
In Jin Shon ◽  
Ji Young Kim ◽  
...  
Keyword(s):  
Grain Size ◽  
Relative Density ◽  
High Frequency ◽  
Holding Time ◽  
Full Width ◽  
Petch Relation ◽  
Sintering Time ◽  
Rapid Sintering ◽  
Sintering Method ◽  
High Frequency Induction

High frequency induction heated sintering (HFIHS) method is one of the rapid sintering methods. The advantage of rapid sintering method is that grain growth can be prevented during sintering at high temperature. Refinement of grains was known to increase the yield and flow stresses of crystals. The relation between the yield stress and the grain size is known as Hall-Petch relation. NbC-10vol.%Co, Ni and Fe composites were fabricated by HFIHS at 1060°C for 0 and 3 min as holding times under a pressure of 80MPa.The relative density of NbC-10vol.%Co, Ni and Fe composites which were sintered at 1060°C for 0min as holding time under 80MPa were 91.90%, 91.26% and 91.26%, respectively. These composites are difficult to use industrial parts due to low relative density. The longer sintering time was conducted for increasing relative density in this study. Nano-sized specimens, which were calculated grain size by full-width at half maximum (FWHM), can be obtained by HFIHS. The value of hardness and fracture toughness was investigated using 20kgf load Vickers indenter.

Simultaneous Synthesis and Densification of Nanostructured NbSi2-SiC-Si3N4 by Rapid Sintering

2010 ◽  
Vol 123-125 ◽  
pp. 209-212
Author(s):  
In Jin Shon ◽  
Hyun Su Kang ◽  
Soo Kyung Bae ◽  
In Yong Ko
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Frequency ◽  
Induced Current ◽  
Simultaneous Application ◽  
Average Grain Size ◽  
Rapid Sintering ◽  
One Step ◽  
Simultaneous Synthesis ◽  
High Frequency Induction

A dense nanostructured 5NbSi2-SiC-Si3N4 composite was synthesized by the high-frequency induction-heated combustion synthesis (HFIHCS) method within 1 minute in one step from mechanically activated powders of 4NbN, NbC and 14Si. A highly dense 5NbSi2-SiC-Si3N4 composite with relative density of up to 98% was produced under the simultaneous application of a pressure of 80 MPa and the induced current. The average grain size and mechanical properties (hardness and fracture toughness) of the composite were investigated.

Mechanochemical Synthesis and Rapid Consolidation of Nanostructured Nb–ZrO2 Composite

2020 ◽  
Vol 20 (7) ◽  
pp. 4253-4256
Author(s):  
Seong-Eun Kim ◽  
Jin-Kook Yoon ◽  
In-Jin Shon
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Frequency ◽  
Ball Mill ◽  
High Energy ◽  
Molar Ratio ◽  
Replacement Reaction ◽  
High Energy Ball Mill ◽  
Energy Ball ◽  
High Frequency Induction

Nb2O5 and Zr powders at a molar ratio of 1:2.5 were milled using a high-energy ball mill. The mixture powders produced Nb and ZrO2 nanopowders through a solid replacement reaction (Nb2O5+ 2.5Zr 2Nb + 2.5ZrO2). The synthesized nanopowders were consolidated via high-frequency induction heated sintering (HFIHS) within two min. The mechanical properties (hardness and fracture toughness) of nanostructured 2Nb–2.5ZrO2 composite were then evaluated. Both the hardness and fracture toughness of the 2Nb–2.5ZrO2 composite were higher than those of monolithic ZrO2.

High-frequency induction heated sintering of High-energy ball milled TiC0.5N0.5 powders and mechanical properties of the sintered products

2013 ◽  
Vol 39 (1) ◽  
pp. 585-591 ◽  
Author(s):  
Wonbaek Kim ◽  
Chang-Yul Suh ◽  
Ki-Min Roh ◽  
Jae-Won Lim ◽  
Sujeong Lee ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Frequency ◽  
High Energy ◽  
Energy Ball ◽  
High Frequency Induction

Rapid Sintering of Nanostructured WC-Graphene Composites and Their Mechanical Properties

2020 ◽  
Vol 20 (7) ◽  
pp. 4436-4439
Author(s):  
Seong-Eun Kim ◽  
Jin-Kook Yoon ◽  
In-Jin Shon
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Frequency ◽  
Second Phase ◽  
Ductile Brittle Transition Temperature ◽  
Reinforcing Agent ◽  
Current Concern ◽  
Rapid Sintering ◽  
Sintering Method ◽  
High Frequency Induction

The current concern about WC focuses on its low fracture toughness below the ductile-brittle transition temperature despite its many attractive properties. To improve its mechanical properties, the approach generally utilized has been the addition of a second phase to form composites and to make nanostructured materials. In this paper, graphene was evaluated as the reinforcing agent in WC ceramics using a novel sintering method (high-frequency induction heated sintering method). Highly dense nanostructured WC and WC-graphene composites were obtained within two min at 1550 °C. The effect of graphene on the grain size and the mechanical properties (hardness and fracture toughness) of WC-graphene composites was evaluated.

Sign in / Sign up

Export Citation Format

Share Document