Hard coatings of metals and ceramics with a new electro-thermal-chemical gun technology

S. Wald; G. Appelbaum; R. Alimi; L. Rabani; S. Cuperman; C. Bruma; D. Zoler; V. Zhitomirsky; M. Factor; I. Roman

doi:10.1016/S0263-4368(98)00075-4

Hard coatings of metals and ceramics with a new electro-thermal-chemical gun technology

S. Wald^*
, G. Appelbaum
, R. Alimi
, L. Rabani
, S. Cuperman
, C. Bruma
, D. Zoler
, V. Zhitomirsky
, M. Factor
, I. Roman

^*Corresponding author for this work

The Institute of Applied Physics

Research output: Contribution to journal › Conference article › peer-review

11 Scopus citations

Abstract

A new spray technology for producing hard-coatings, using an electro-thermal chemical (ETC) gun is presented. The powder particles of the coating material are accelerated by conventional solid or liquid propellant combustion products. A pulsed-plasma jet, provided by a confined capillary discharge, ignites the propellant and controls the combustion process. The powder particles are accelerated to velocities calculated to be over 1000 m/s. A high throughput and high powder consumption efficiency is obtained due to the very high carrier gas density and velocity. The plasma jet enables control of the gas temperature, and consequently influences the powder temperature. The technology capabilities have been demonstrated using several material systems such as sintered carbides to obtain coatings on stainless steel and other substrates. In order to evaluate the coating device performance, the coatings obtained were characterized chemically and physically, and a physical model describing the complex processes taking place within the gun was developed. The model is able to predict the main propelling gas and particle parameters, in particular, their acceleration and heating processes.

Original language	English
Pages (from-to)	171-177
Number of pages	7
Journal	International Journal of Refractory Metals and Hard Materials
Volume	17
Issue number	1
DOIs	https://doi.org/10.1016/S0263-4368(98)00075-4
State	Published - May 1999
Event	Proceedings of the 1998 Science of hard Materials - 66th International Conference on the Science of hard Materials (ICSHMS6) - Lanzarote, Spain Duration: 9 Mar 1998 → 14 Mar 1998

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title = "Hard coatings of metals and ceramics with a new electro-thermal-chemical gun technology",

abstract = "A new spray technology for producing hard-coatings, using an electro-thermal chemical (ETC) gun is presented. The powder particles of the coating material are accelerated by conventional solid or liquid propellant combustion products. A pulsed-plasma jet, provided by a confined capillary discharge, ignites the propellant and controls the combustion process. The powder particles are accelerated to velocities calculated to be over 1000 m/s. A high throughput and high powder consumption efficiency is obtained due to the very high carrier gas density and velocity. The plasma jet enables control of the gas temperature, and consequently influences the powder temperature. The technology capabilities have been demonstrated using several material systems such as sintered carbides to obtain coatings on stainless steel and other substrates. In order to evaluate the coating device performance, the coatings obtained were characterized chemically and physically, and a physical model describing the complex processes taking place within the gun was developed. The model is able to predict the main propelling gas and particle parameters, in particular, their acceleration and heating processes.",

author = "S. Wald and G. Appelbaum and R. Alimi and L. Rabani and S. Cuperman and C. Bruma and D. Zoler and V. Zhitomirsky and M. Factor and I. Roman",

year = "1999",

month = may,

doi = "10.1016/S0263-4368(98)00075-4",

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AU - Wald, S.

AU - Appelbaum, G.

AU - Alimi, R.

AU - Rabani, L.

AU - Cuperman, S.

AU - Bruma, C.

AU - Zoler, D.

AU - Zhitomirsky, V.

AU - Factor, M.

AU - Roman, I.

PY - 1999/5

Y1 - 1999/5

N2 - A new spray technology for producing hard-coatings, using an electro-thermal chemical (ETC) gun is presented. The powder particles of the coating material are accelerated by conventional solid or liquid propellant combustion products. A pulsed-plasma jet, provided by a confined capillary discharge, ignites the propellant and controls the combustion process. The powder particles are accelerated to velocities calculated to be over 1000 m/s. A high throughput and high powder consumption efficiency is obtained due to the very high carrier gas density and velocity. The plasma jet enables control of the gas temperature, and consequently influences the powder temperature. The technology capabilities have been demonstrated using several material systems such as sintered carbides to obtain coatings on stainless steel and other substrates. In order to evaluate the coating device performance, the coatings obtained were characterized chemically and physically, and a physical model describing the complex processes taking place within the gun was developed. The model is able to predict the main propelling gas and particle parameters, in particular, their acceleration and heating processes.

AB - A new spray technology for producing hard-coatings, using an electro-thermal chemical (ETC) gun is presented. The powder particles of the coating material are accelerated by conventional solid or liquid propellant combustion products. A pulsed-plasma jet, provided by a confined capillary discharge, ignites the propellant and controls the combustion process. The powder particles are accelerated to velocities calculated to be over 1000 m/s. A high throughput and high powder consumption efficiency is obtained due to the very high carrier gas density and velocity. The plasma jet enables control of the gas temperature, and consequently influences the powder temperature. The technology capabilities have been demonstrated using several material systems such as sintered carbides to obtain coatings on stainless steel and other substrates. In order to evaluate the coating device performance, the coatings obtained were characterized chemically and physically, and a physical model describing the complex processes taking place within the gun was developed. The model is able to predict the main propelling gas and particle parameters, in particular, their acceleration and heating processes.

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JO - International Journal of Refractory Metals and Hard Materials

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T2 - Proceedings of the 1998 Science of hard Materials - 66th International Conference on the Science of hard Materials (ICSHMS6)

Y2 - 9 March 1998 through 14 March 1998

ER -

Hard coatings of metals and ceramics with a new electro-thermal-chemical gun technology

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