Characteristics of a Stack Separator Prepared from Composites of Stainless Steel and TiNx for Fuel Cells

Turaev, Farkhod R.; Park, Sung Bum; Bahn, Taeho; Kim, Sung Jin; Ahn, Jung-Ho; Hong, Tae Hwan

doi:10.3938/jkps.54.1091

Cited by 5 publications

(4 citation statements)

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“…The TiH 2 content in samples is strongly affected to average densities. The densities for the sintered samples with 20 wt% and 50 wt% TiH 2 were equal to 5,48 and 4,83 g/cm 3 , respectively. As expected, the density increase linearly with decreasing of TiH 2 content and reach maximum at ratio of 2 wt% which is even more that STS composite (see Fig.…”

Section: Resultsmentioning

confidence: 96%

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Effect of TiH<sub>2</sub> Composition on Porous Stainless Steel and Titanium Hydride Composite Synthesized by Spark Plasma Sintering

Allabergenov

Tursunkulov

Abidov

et al. 2013

AMR

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The main aim of this research was to investigate the influence of processing parameters on the me-chanical properties and morphology of porous STS:TiH2 composites made by using spark plasma sintering method. Mechanical parameters and structural analysis of the fabricated composite have been investigated by Rockwell hardness, density tester, optical microscope, XRD and FE-SEM. In particular the porous stainless steel (STS) and titanium hydride TiH2 composites materials with op-timal ratio were prepared with using additional hollow glass microsphere and water glass for con-trolling of the porosity degree. It is found, that the porosity degree depended on addition of TiH2 and hollow glass additive, resulting to modification of the pore shape and size. I was shown that the dispersion of STS/TiH2 composite which sintered by spark plasma sintering method without pressure result to increasing of mechanical properties (hardness and density). According to obtained results, the addition of TiH2 powder into STS improves the mechanical property of the synthesized specimens especially the specimens with addition 20 wt% and 50 wt% of TiH2 demonstrated high hardness values and good density.

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Section: Resultsmentioning

confidence: 96%

“…Titanium and titanium based compounds is the attractive multifunctional type materials which are most frequently used composites in many fields [1][2][3][4]. The extensive use of metallic alloys is related to the availability and success at the beginning of the last century of several different alloys made of the noble metals [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of TiH<sub>2</sub> Composition on Porous Stainless Steel and Titanium Hydride Composite Synthesized by Spark Plasma Sintering

Allabergenov

Tursunkulov

Abidov

et al. 2013

AMR

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“…Therefore, metalloid nitrides and carbonitrides, in particular, titanium carbonitride (TiCN), receive high interest due to their desirable properties, such as high hardness, high thermal conductivity and high corrosion resistance. [17][18][19] It was reported that coating a steel substrate with a TiCN film deposited by plasma assisted physical vapor deposition can provide a significant increase in the range of 140-180%, in fatigue life, in comparison with the uncoated substrate. 20 In this paper, the fabrication of bipolar plate using low-price STS 430 L metal powders and ultrafine titanium carbonitride TiCN powder is investigated.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of stainless steel composites with titanium carbonitride consolidated by spark plasma sintering

Allabergenov

Tursunkulov

Abidov

et al. 2015

Journal of Composite Materials

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In this paper, stainless steel-titanium carbonitride-based composites were fabricated and analyzed to utilize for bipolar plate in fuel cells. In order to study the size effect of titanium carbonitride on the mechanical and corrosion resistance properties of the composites, micro and nanosize titanium carbonitride powders were used. Stainless steel-carbonitride composites were prepared by spark plasma sintering and subsequently annealed at different temperatures up to 1100 C to improve the morphological and mechanical properties. Various properties of the obtained samples were compared before and after annealing. It was shown that after heat treatment, the mechanical properties of the stainless steelcarbonitride composites improved due to the diffusion of titanium carbonitride particles into stainless steel. Addition of microsized titanium carbonitride powders was found to be effective to improve the mechanical properties, such as microhardness and compressive strength, of the composite. However, addition of nanosized titanium carbonitride powders led to an increase of corrosion resistivity of the composite. Physical properties, such as thermal and chemical stability of the obtained composite samples were investigated by microhardness tester, potentiostat, field emissionscanning electron microscope, EDX and X-ray diffraction.

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“…On other hand, separators made of metallic alloys can increase the efficiency of the solid oxide fuel cells because they have a high electrical conductivity and they demonstrate better thermal conductivity than polymers. Among alloys, stainless steel with metalloid nitride and carbonitride are optimal material because of its relatively high strength and chemical stability, it is also cost-effective and available in a wide range of alloy types [9], [10]. Recently Lee et al investigated corrosion behavior of dissimilar brazed joints between titanium and STS.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Annealing on Mechanical Properties of the Stainless Steel with TiCxNy Composites

Allabergenov¹,

Tursunkulov²,

Abidov³

et al. 2013

IJMMM

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Abstract-In this work we fabricated STS430L-TiC x N y composites by spark plasma sintering. As sintered STS:TiC x N y samples were annealed at 800 ~ 1100 °C and their morphological and mechanical properties were analyzed. All properties before and after annealing were compared in order to study the thermal annealing effect on mechanical properties. The annealing process at high temperature led to the crystallization of the STS:TiC x N y and increased the grain size, which was confirmed by FE-SEM analysis. Micro-hardness value was 750 MHV at 800 °C and reached its maximum value of 918 MHV at 1000 °C , respectively. A heights corrosion resistance property was observed for the samples annealed at 1100 °C. Overall, composites with micro TiC x N y after high temperature annealing show improved properties compared to as sintered composites, making it possible to be utilizes in fuel cell.

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Characteristics of a Stack Separator Prepared from Composites of Stainless Steel and TiNx for Fuel Cells

Cited by 5 publications

References 0 publications

Effect of TiH<sub>2</sub> Composition on Porous Stainless Steel and Titanium Hydride Composite Synthesized by Spark Plasma Sintering

Effect of TiH<sub>2</sub> Composition on Porous Stainless Steel and Titanium Hydride Composite Synthesized by Spark Plasma Sintering

Mechanical properties of stainless steel composites with titanium carbonitride consolidated by spark plasma sintering

Effect of Thermal Annealing on Mechanical Properties of the Stainless Steel with TiCxNy Composites

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