Abstract
The properties of pulsed laser deposited of Ni60Ti40 shape memory thin films generated in various deposition conditions were investigated. In-situ plasma monitoring was implemented by means of space- and time-resolved optical emission spectroscopy, and ICCD fast camera imaging. Structural and chemical analyses were performed on the thin films using SEM, AFM, EDS, and XRD equipment. The deposition parameters influence on the chemical composition of the thin films was investigated. The peeled layer presented on DSC a solid-state transformation in a different transformation domain compared to the target properties. A fractal model was used to describe the dynamics of laser produced plasma through various non-differentiable functionalities. Through hydrodynamic type regimes, space-time homographic transformations were correlated with the global dynamics of the ablation plasmas. Spatial simultaneity of homographic transformation through a special SL(2R) invariance implies the description of plasma dynamics through Riccati type equations, establishing correlations with the optical emission spectroscopy measurements.
Highlights
Due to the demand of applications in the field of engineering, the new materials are kept in a developing state in order to improve their performance, and for creating new functions.Among these, there is a group of materials that are able to respond to a special stimulus through the alteration of the encircling physical and chemical features
In this paper we report the experimental results on the deposition of thin films with special properties using Nitinol targets
Spatial simultaneity of homographic transformation through a special SL(2R) invariance implies the description of plasma dynamics through Riccati type equations can be used to describe the dynamics of ablation plasma seen through the optical emission spectroscopy measurements
Summary
Due to the demand of applications in the field of engineering, the new materials are kept in a developing state in order to improve their performance, and for creating new functions. The transformation process of a bulk alloy with shape memory in thin film is accompanied by numerous important changes at the level of the mechanical, physical, chemical, electric, and optical properties such as the load resistance, elastic module, hardness, and attenuation capacity, regaining the initial form, electric resistivity, thermic conductivity, thermic expansion coefficient, surface rugosity, vapors permeability, and the dielectric constant, etc. This transformation can be used in designing and fabricating micro-sensors and micro-actuators. Spatial simultaneity of homographic transformation through a special SL(2R) invariance implies the description of plasma dynamics through Riccati type equations can be used to describe the dynamics of ablation plasma seen through the optical emission spectroscopy measurements
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