The effect of 5 different surface conditioning methods on bonding of metal brackets to cast dental alloys was examined. The surface conditioning methods were fine (30-microm) or rough (125-microm) diamond bur, sandblasting (50-microm or 110-microm aluminum oxide [Al2O3]), and silica coating (30-microm silica). Fifty disc-shaped specimens of 5 different alloys (gold-silver, palladium-silver, nic...

A new approach for analyzing cracked problems in 2D orthotropic materials using the well-known element free Galerkin method and orthotropic enrichment functions is proposed. The element free Galerkin method is a meshfree method which enables discontinuous problems to be modeled efficiently. In this study, element free Galerkin is extrinsically enriched by the recently developed crack-tip orthot...

The paper proposes methods to predict the reliability of a multilayered coating based on model with independently (sequentially) degrading layers. For mathematical description process crack penetration into depth layered solid body from free surface certain roughness, propagation tip layer adjacent boundary is considered. This stochastic described through specification all multipoint probabilit...

The analysis of vibration over coated sample is required to investigate the and noise damping behaviors coatings. In this research work, conventional gun spray method used coat oxime modified titanium (IV) isopropoxide on steel find out behaviour coating. most modal measure bare titania samples. During test it was observed that a thin coating has improved when compare with sample. surface morph...

Arrayed microchannels with dimensions of tens to hundreds of micrometres show great potential for application in microfluidics, microreactor devices and other areas. In this work, we report the formation of ordered arrays of cracks on solution-cast colloidal films, and the preparation of radially aligned microchannels. The polymer film coating enables the colloidal film to be detached from the ...

sol–gel chemistry is an efficient tool to control the morphology and reactivity of solids. drying is the crucial step due to the capillary forces exerted during the classic ambient drying process, which induces the collapse of the wet gel porosity. the use of n, n-dimethylformamide (dmf), a newly found dcca were found to be effective in the sol–gel synthesis of crack-free silica gel monolith fr...

This paper presents the results of numerical calculations heat transfer in steel wall a tube with different chromium layer thicknesses on inner surface for single and sequence impulses. In modeling thermal phenomenon, material was assumed to be homogeneous, had protective layer. The were performed temperature-dependent parameters 30HN2MFA chromium. divided into 30 zones. time varying coefficien...

A Cr13Ni5Si2-based composite coating was successfully deposited on copper by pulse laser induction hybrid cladding (PLIC), and its high-temperature wear behavior was investigated. Temperature evolutions associated with crack behaviors in PLIC were analyzed and compared with pulse laser cladding (PLC) using the finite element method. The microstructure and present phases were analyzed using scan...

The potential of inorganic nanomaterials as reservoirs for healing agents is presented here. Mesoporous silica (SBA-15) and TiO2 nanotubes (TNTs) were synthesized. Both epoxy-encapsulated TiO2 nanotubes and amine-immobilized mesoporous silica were incorporated into epoxy and subsequently coated on a carbon steel substrate. The encapsulated TiO2 nanotubes was quantitatively estimated using a 'de...

Half of today's global energy consumption is in the form heating and cooling. Solar collectors are most promising sustainable alternative to fossil fuels this sector. The important component a solar collector receiver, which by use selective surface absorbs converts irradiance thermal energy. Herein, novel for low-to mid-temperature developed, studied presented. produced electroplating cobalt-c...