Properties of titanmm-aluminide layer formed by low pressure plasma spraying

Honda, Keizoh; Hirose, Akio; Kobayashi, Kojiro F.

doi:10.1016/s0921-5093(96)10528-1

Cited by 9 publications

(9 citation statements)

References 8 publications

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“…APS, VPS and HVOF coatings were also tested under cyclic and isothermal oxidation tests at 700 and 900 C [147]. Dewald et al reported improved results for the cyclic oxidation resistance of their HVOF and APS (<1% oxide) deposits predicting that those could increase the service temperature by 150 C more than the substrate material.…”

Section: High Velocity Oxygen Fuel (Hvof) and Atmospheric Plasma Spray mentioning

confidence: 99%

“…Concerning mechanical properties, some hardness values of TiAl LPPS coatings are found to be 589 HV and above 400 HV at 1073 K, while it decreases to 225 HV 200 at 1173 K (similar values to that of a TiAl bulk plate at room temperature) [147]. Moreover, the use of such intermetallics has also been proposed as matrix with ceramic particles reinforcement to improve the wear resistance of Ti6Al4V substrates [140].…”

Section: High Velocity Oxygen Fuel (Hvof) and Atmospheric Plasma Spray mentioning

confidence: 99%

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Thermal spraying of transition metal aluminides: An overview

Cinca

Guilemany

2012

Intermetallics

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Section: High Velocity Oxygen Fuel (Hvof) and Atmospheric Plasma Spray mentioning

confidence: 99%

Section: High Velocity Oxygen Fuel (Hvof) and Atmospheric Plasma Spray mentioning

confidence: 99%

Thermal spraying of transition metal aluminides: An overview

Cinca

Guilemany

2012

Intermetallics

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“…The cooling rates of particle/droplet are typically in the range of 10 6{8 Ks À1 , and generally give rise to a rapidly solidified and refined microstructure. [1][2][3][4] The majority of plasma spraying operations are carried out in ambient atmosphere and this technique is referred to an atmospheric plasma spraying (APS). In a low pressure plasma spraying (LPPS), spraying is performed in a sealed chamber maintained at a reduced pressure of inert gas, Ar, having firstly been evacuated to a rough vacuum.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution and Tensile Properties of Ti-Al-V Alloys Manufactured by Plasma Spraying and Subsequent Vacuum Hot Pressing

Baik

2006

Mater. Trans.

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Ti-Al-V preforms were manufactured by low pressure plasma spraying (LPPS) from two different sizes of Ti-6Al-4V feedstock powders, and subsequently consolidated by vacuum hot pressing (VHP). During LPPS, a loss of alloying elements and an incorporation of [H] and [O] occurred, which were much significant for a smaller feedstock powder. Subsequent VHP completely removed [H] content, whereas a considerable amount of [O] remained. The microstructure of LPPS deposits comprised a splat-quenched lamellar structure, incorporating unmelted particles. The each splat contained 0 martensite plates and Ti hydrides which provided heterogeneous nucleation sites for recrystallization during subsequent VHP, transforming into an equiaxed grain structure. The tensile properties of LPPS/VHP Ti-Al-V alloy were primarily affected by [O] content. An increase in [O] content up to 0.35 mass% increased tensile strength, but dramatically decreased ductility. Further [O] incorporation formed a large fraction of embrittled -phase, resulting in a significant decrease in both tensile strength and ductility.

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“…[5][6][7][8][9] The process involves the sequential stages of particle melting, projection, quenching, and consolidation in a single process. [5][6][7][8][9] The process involves the sequential stages of particle melting, projection, quenching, and consolidation in a single process.…”

Section: Introductionmentioning

confidence: 99%

Non-equilibrium Microstructure and Thermal Stability of Plasma-sprayed Al–Si Coatings

et al. 2005

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A splat-quenched, thick Al-Si deposit was manufactured by low-pressure plasma spraying (LPPS) and investigated in terms of microstructural inhomogeneity, Si solid solubility in ␣-Al, formation of metastable phases, and thermal stability. The LPPS Al-Si deposit had an inhomogeneous, layered microstructure consisting of splat-quenched lamellae and the incorporation of unmelted or partially melted particles. The splat-quenched Al-Si lamellae were formed by deposition of a fully liquid droplet and had an almost featureless microstructure at relatively low magnifications. There was a significant reduction in the ␣-Al lattice parameter in the LPPS Al-Si deposit because of extended Si solubility in the ␣-Al matrix. Transmission electron microscopy investigations showed that the splat quenching of liquid Al-Si droplet led to (i) columnar grain growth of ␣-Al(Si), (ii) formation of nano-sized Si precipitates in the Al matrix which was supersaturated with Si; and (iii) formation of amorphous Si phase embedded in the crystalline Al matrix. On reheating, the amorphous Si transformed into fine crystalline Si by interdiffusion of Al and Si atoms. Simultaneously, Si precipitation occurred in the supersaturated ␣-Al matrix. The overall activation energy for the Si crystallization/precipitation was estimated as ∼81 kJ/mol from a modified Kissinger analysis.

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Properties of titanmm-aluminide layer formed by low pressure plasma spraying

Cited by 9 publications

References 8 publications

Thermal spraying of transition metal aluminides: An overview

Thermal spraying of transition metal aluminides: An overview

Microstructural Evolution and Tensile Properties of Ti-Al-V Alloys Manufactured by Plasma Spraying and Subsequent Vacuum Hot Pressing

Non-equilibrium Microstructure and Thermal Stability of Plasma-sprayed Al–Si Coatings

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