Advancement in the reduction of technical noise and isolation of seismic vibration has let a high-precision measurement device like the interferometric gravitational-wave detectors [1] be so sensitive that tiny thermal fluctuation of the measurement surface can limit the sensitivity. It is important to develop a method to estimate the thermalnoise level as accurately as possible. Our study with...

Usually, the calculation for bodies with laminated coatings is connected with formulating and solving appropriate problems of mathematical physics for multilayer systems, which are cumbersome and ineffective for practical purposes and are typically used as standards in elaborating approximate methods. This paper suggests an approach essentially simplifying solving the problems of the determinat...

Article history: Received 1 October 2015 Received in revised form 29 January 2016 Accepted 8 February 2016 Available online xxxx Amorphous tantala (a-Ta2O5) is an important technological material that has wide ranging applications in electronics, optics and the biomedical industry. It is used as the high refractive index layers in themulti-layer dielectric mirror coatings in the latest generati...

A key component in the conversion process of concentrated solar power (CSP) into thermal energy is a absorber coating. Many experimental and simulated coatings for various substrates CSP water/steam or molten salt absorbers have been developed. The main challenges today remain selection low-cost effective fabrication method, appropriate industrial production, assessment degradation rate service...

Yttria-stabilized zirconia (YSZ) has been used as a thermal/environmental barrier coating for gas turbine engine blades. Current methods of fabrication include air plasma spraying (APS) and electron-beam physical vapor deposition (EB-PVD). The APS technique results in a coating that loses effectiveness with thermal cycling. The EB-PVD technique deposits a columnar microstructure which accommoda...

High power laser – total emissivity method (HPL-TE method) for determination of coatings relative total emissivity dependent on the temperature is introduced. Method principle, experimental and evaluation parts of the method are described. Computer model of HPL-TE method is employed to perform the sensitivity analysis of the effect of method parameters on the sample surface temperature in the p...

The techniques for estimating the adhesive and cohesive strength in high velocity oxy fuel (HVOF) thermal spray coatings have been discussed and compared. The development trend and the last investigation have been studied. We will focus on benefits and limitations of these methods in different process and materials. Keywords—Adhesion, Bonding strength, Cohesion, HVOF Thermal spray

In this paper, the bond strength of thermal spray coatings in high speed shafts has been studied. The metallurgical and mechanical studies has been made on the coated samples and shaft using optical microscopy, scanning electron microscopy (SEM). Keywords—Thermal spray, Residual stress, Wear mechanism, HVOF, Gas compressor shafts

A Workshop was held on the subject of Thin Film Thermal Conductivity Measurement as part of the Thirteenth Symposium on Thermophysical Properties at the University of Colorado in Boulder CO, June 25-26, 1997. The purpose of this Workshop was to provide a forum for producers and users of thermal properties data to discuss the unique problems associated with measuring the thermal conductivities o...

Thermally sprayed coatings are intrinsically associated with residual stresses in the deposits. These stresses are varied in nature and magnitude, and have a pronounced effect on the mechanical behavior of the system. In the current study, WC-12Co coatings were deposited using HVOF thermal spraying. The sin2ψ method was used to evaluate the through thickness residual stress by means ...