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Effect of substrate thickness on coating roughness Ti/AlTiN during interaction process Parameter
摘要： Ti/TiAlN coatings were deposited on tungsten carbide substrates and consist of the target Ti0.5Al0.5 using sputtering system is one of the main techniques which done be coating substrate. This research aimed is to develop the model a PVD magnetron sputtering process that can predict the relationship between process input parameters and the resulting coating properties and performance. RSM Response Surface Methodology was used, one of the most cost-effective and practical techniques to develop the process model. The influence of substrate thickness on the structural properties of the coatings was investigated and the effect of bias voltage on the microstructure was investigated. The number of crystallite grain size reduced with the increase of the bias voltage then reduce minimum roughness 0.07157 (μm) and became maximum roughness 0.7856 (μm). The crystalline grain size of the coatings increased as the bias voltage was raised from 50 to 75 V, and then decreased with further increase of the bias voltage.
关键词： interaction,PVD,Sputtering,surface roughness,RSM
更新于2025-09-04 15:30:14
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Characterization of the effect of fabric structure on the optical properties of woven fabrics
摘要： Purpose – This paper aims to study the optical properties of woven fabrics. Design/methodology/approach – The current study was carried out to objectively evaluate the luster of a group of woven fabrics with different weave structures and weft densities, with the aid of a goniophotometer. The results obtained from the objective luster measurement were validated by a set of pair comparison subjective tests using Thurstone’s law of comparative judgment. Findings – The proper correlation with the R2 value of more than 0.96, between subjective and objective tests, confirmed the reliability and accordance of objective results with the human perception of luster. Statistical analysis of the luster results clarified that the effect of fabric structural parameters such as weave structure and weft density are significant at the confidence range of 95 per cent. The highest luster index was achieved for the twill 3/1 weave structure and the lowest luster belonged to the plain pattern. In addition, an increase in the density of the fabric leads to better luster. Moreover, it was concluded that the surface roughness affects the luster. A rise in the roughness value of the woven fabric causes reduction in its luster property. Originality/value – Optical properties of woven fabrics, which are mainly attributed through the measurement of luster, are important for qualifying the aesthetic characteristics of the fabrics with various weave structures. Bearing in mind the influence of fabric surface properties on the aesthetic features of cloths, obtaining information in this field is a guide for selecting the suitable fabric for various end uses.
关键词： Fabric structure,Roughness,Thurstoneu’s law,Luster
更新于2025-09-04 15:30:14
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Correlation of Near Infrared Spectroscopy Measurements with the Surface Roughness of Wood
摘要： The surface roughness of Chinese fir and Eucalyptus wood samples were measured using the stylus profile method in order to investigate the correlation between near infrared (NIR) spectroscopy and surface roughness. The results showed that the NIR spectra absorption showed differences among samples from different surface roughnesses, and the absorption decreased with the increase of the surface roughness. A strong relationship was found between the surface roughness parameters, i.e., the arithmetical mean deviation of the profile (Ra), the ten-point height of irregularities (Rz), and the maximum height of profile (Ry). Based on the NIR spectra of the Chinese fir wood samples and the mixed wood samples of the two wood species, and the correlation coefficients of these two types of wood samples in a calibration set were 0.77 to 0.83 and 0.67 to 0.74, respectively. A relatively poor correlation was found in the model based on the Eucalyptus samples; however, it was still significant. These results suggested that there was relative information about the surface roughness from the NIR spectra, which further illustrated that the surface roughness may influence the effect of models for wood properties built by NIR data.
关键词： Near infrared spectroscopy,Correlation,Wood,Surface roughness
更新于2025-09-04 15:30:14