The oxidation resistance of MoSi2 composites

Lee, E. W.; Cook, J P; Khan, A.; Mahapatra, Rabindra Narayan; Waldman, J.

doi:10.1007/bf03220165

Cited by 23 publications

(6 citation statements)

References 2 publications

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“…The refractory metals such as molybdenum, tungsten, niobium and tantalum have great potential for high-temperature applications [1][2][3]. In particular, Nb-base alloys have been considered as the most preferable materials for future turbine blades in recent years due to their high melting point, low density and good formability [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Interdiffusion behavior between Nb and MoSi2 intermetallic compound

Yao

Yang

Gong

et al. 2010

Materials Science and Engineering: A

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Section: Introductionmentioning

confidence: 99%

Interdiffusion behavior between Nb and MoSi2 intermetallic compound

Yao

Yang

Gong

et al. 2010

Materials Science and Engineering: A

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“…Since the silicon content in Mo 5 Si 3 is lower than MoSi 2 , the amount of SiO 2 resulting from the oxidation of Mo 5 Si 3 is very limited. As a result, only porous SiO 2 was present in the coating 6) . Therefore, as far as Mo 5 Si 3 is formed during deposition of the intermediate layer, a dense protective coating of SiO 2 cannot be formed within the cracks resulting from the thermal strain.…”

Section: Results and Discussion 31 Thermal Cyclic Resistancementioning

confidence: 99%

Development of thermal barrier coating system with an intermediate layer containing MoSi<inf>2</inf> with superior thermal cyclic properties

Sonoya

Nakamura

Sekine

2014

2014 IEEE 8th International Power Engineering and Optimization Conference (PEOCO2014)

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The authors have developed a successful method for improving the thermal cyclic resistance of the thermal barrier coating system that is deposited on gas turbine components. Conventional thermal barrier coating consists of duplex systems, top coating and bond coating. The developed system introduces a protective intermediate layer of MoSi 2 for preventing oxidation of the bond coating. Conventional duplex plasma sprayed coating was delaminated after 20 thermal cycles. On the other hand the developed triple layered coating system was not delaminated up to 60 cycles. The reason for the enhanced resistance to thermal cycle of the developed triple layered coating system is that the MoSi 2 layer existing between the top coating and the bond coating has the selfrepairing property. Here, MoSi 2 oxidizes to form SiO 2 which seals the cracks and pores formed between the top coating and the bond coating. Thus, the formation of TGO which leads to coating delamination is prevented and the thermal cyclic resistance is improved.

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“…Coating ----(1) Since the silicon content in Mo 5 Si 3 is lower than that in MoSi 2 , the amount of SiO 2 resulting from the oxidation of Mo 5 Si 3 is very limited. As a result, only porous SiO 2 was present in the coating (5) . Therefore, when Mo 5 Si 3 is formed during the deposition of the intermediate layer, a dense protective coating of SiO 2 cannot be formed within the cracks resulting from the thermal strain.…”

Section: Methodsmentioning

confidence: 99%

Development of Thermal Barrier Coating System with Superior Thermal Cyclic Properties with an Intermediate Layer Containing MoSi<SUB>2</SUB>

Sonoya

Tobe

2009

JMMP

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The authors have developed a method of improving the thermal cyclic resistance of the thermal barrier coating system that is deposited on gas turbine components. A conventional thermal barrier coating consists of a duplex system: a top coating and a bond coating. The developed system has a protective intermediate layer of MoSi 2 which prevents oxidation of the bond coating. The conventional duplex plasma-sprayed coating was delaminated after 20 thermal cycles. On the other hand, the developed triple-layered coating system was not delaminated after 60 cycles. The reason for the enhanced resistance to thermal cycles of the developed triple-layered coating system is that the MoSi 2 layer between the top coating and the bond coating has a self-repairing property. MoSi 2 oxidizes to form SiO 2 , which seals the cracks and pores formed between the top coating and the bond coating. Thus, the formation of a thermally grown oxide(TGO), which causes the delamination of the coating, is prevented and the thermal cyclic resistance is improved.

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The oxidation resistance of MoSi2 composites

Cited by 23 publications

References 2 publications

Interdiffusion behavior between Nb and MoSi2 intermetallic compound

Interdiffusion behavior between Nb and MoSi2 intermetallic compound

Development of thermal barrier coating system with an intermediate layer containing MoSi<inf>2</inf> with superior thermal cyclic properties

Development of Thermal Barrier Coating System with Superior Thermal Cyclic Properties with an Intermediate Layer Containing MoSi<SUB>2</SUB>

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