Diffusion in Ti/TiC multilayer coatings

I. Dahan; U. Admon; N. Frage; J. Sariel; M. P. Dariel

doi:10.1016/S0040-6090(00)01282-7

Diffusion in Ti/TiC multilayer coatings

I. Dahan, U. Admon, N. Frage, J. Sariel, M. P. Dariel

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

The present communication is concerned with the interdiffusion kinetics and the local concentration variations that take place in Ti/TiC multilayer system as a result of thermal anneals between 355 and 550 °C. Within this temperature range, carbon is the diffusing species. Carbon diffuses from the carbide layer into the adjacent Ti layers, depleting its concentration within the former and decreasing the width of the latter. Data extracted from diffraction patterns allowed to determine the changes that take place in the relative amount of the two phases as a function of time. By fitting the experimental data to a simple model, we were able to determine the diffusivities of carbon at different temperatures and hence, the activation energy, 132 kJ/mol. This value is significantly lower than expected from extrapolation of data obtained at elevated temperatures and can be attributed to the high defect content of micro-thick multilayers sputter-deposited at low temperature.

Original language	English
Pages (from-to)	687-693
Number of pages	7
Journal	Thin Solid Films
Volume	377-378
DOIs	https://doi.org/10.1016/S0040-6090(00)01282-7
State	Published - 1 Dec 2000

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Surfaces and Interfaces
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

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10.1016/S0040-6090(00)01282-7

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title = "Diffusion in Ti/TiC multilayer coatings",

abstract = "The present communication is concerned with the interdiffusion kinetics and the local concentration variations that take place in Ti/TiC multilayer system as a result of thermal anneals between 355 and 550 °C. Within this temperature range, carbon is the diffusing species. Carbon diffuses from the carbide layer into the adjacent Ti layers, depleting its concentration within the former and decreasing the width of the latter. Data extracted from diffraction patterns allowed to determine the changes that take place in the relative amount of the two phases as a function of time. By fitting the experimental data to a simple model, we were able to determine the diffusivities of carbon at different temperatures and hence, the activation energy, 132 kJ/mol. This value is significantly lower than expected from extrapolation of data obtained at elevated temperatures and can be attributed to the high defect content of micro-thick multilayers sputter-deposited at low temperature.",

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T1 - Diffusion in Ti/TiC multilayer coatings

AU - Dahan, I.

AU - Admon, U.

AU - Frage, N.

AU - Sariel, J.

AU - Dariel, M. P.

PY - 2000/12/1

Y1 - 2000/12/1

N2 - The present communication is concerned with the interdiffusion kinetics and the local concentration variations that take place in Ti/TiC multilayer system as a result of thermal anneals between 355 and 550 °C. Within this temperature range, carbon is the diffusing species. Carbon diffuses from the carbide layer into the adjacent Ti layers, depleting its concentration within the former and decreasing the width of the latter. Data extracted from diffraction patterns allowed to determine the changes that take place in the relative amount of the two phases as a function of time. By fitting the experimental data to a simple model, we were able to determine the diffusivities of carbon at different temperatures and hence, the activation energy, 132 kJ/mol. This value is significantly lower than expected from extrapolation of data obtained at elevated temperatures and can be attributed to the high defect content of micro-thick multilayers sputter-deposited at low temperature.

AB - The present communication is concerned with the interdiffusion kinetics and the local concentration variations that take place in Ti/TiC multilayer system as a result of thermal anneals between 355 and 550 °C. Within this temperature range, carbon is the diffusing species. Carbon diffuses from the carbide layer into the adjacent Ti layers, depleting its concentration within the former and decreasing the width of the latter. Data extracted from diffraction patterns allowed to determine the changes that take place in the relative amount of the two phases as a function of time. By fitting the experimental data to a simple model, we were able to determine the diffusivities of carbon at different temperatures and hence, the activation energy, 132 kJ/mol. This value is significantly lower than expected from extrapolation of data obtained at elevated temperatures and can be attributed to the high defect content of micro-thick multilayers sputter-deposited at low temperature.

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DO - 10.1016/S0040-6090(00)01282-7

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VL - 377-378

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JO - Thin Solid Films

JF - Thin Solid Films

ER -

Diffusion in Ti/TiC multilayer coatings

Abstract

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