sture management fabric when the coating was applied on next-to-skin surface.21:T542,Coir mat was used as reinforcement, polyester resin was used as matrix and coconut shell powder (CSP) was used as filler material which was employed as 10, 20, 30, 40, 50, 60 and 100% by weight in the composites. Coir mat/polyester resin composites were made by hand lay-up technique. Mechanical properties such as tensile strength (TS), bending strength (BS), tensile modulus (TM), bending modulus (BM), elongation at break and impact strength (IS) were also investigated. The maximum increase of TS, BS, TM, BM and IS were found to be 44.44, 128.00, 17.96, 112.09 and 62.50% respectively for 30% filler content on the composites. It was revealed that the strength properties of the composites were increased with the increase in filler content up to 30% by weight, however, further increase in filler content the value decreased. Gamma radiation of 100, 250 and 300 krad doses were applied on 30, 40 and 60% filler content composites. Gamma radiation dose of 250 krad showed better result than that of other doses. IS of the composites improved 48.08, 26.67 and 17.50% for 30, 40 and 60% filler content respectively at 250 krad, where 30% filler content composites displayed the highest improvement. Degradation tests of the composites for up to 50 days were performed in a soil medium. It was revealed that BS decreased for all the composites.22:T480,The dangerous process in boiler steel tube is corrosion due to loss of metal by the attack of corrosive agents. In order to prevent this corrosion Cr₃C₂–25 (Ni–20Cr) and Ni-20Cr coatings were deposited on T91 boiler tube steel by high velocity oxy-fuel (HVOF) process. Hot corrosion studies were conducted on uncoated and HVOF-coated T-91 steel specimens after exposure to a molten salt (Na₂SO₄–60%V₂O₅) environment at 900℃ under cyclic conditions. Each cycle consisted 1 h of heating in tube furnace followed by 20 min of cooling in air. The weight change measurements were performed after each cycle in order to establish the kinetics of corrosion using thermogravimetric technique. X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray analysis (SEM/EDS) were used to analyze the corrosion products. The bare steel experienced higher weight gain due to the formation of unprotective Fe₂O₃ dominated oxide scales. The Cr₃C₂–25(Ni–20Cr) coating was found to be more protective than the Ni-20Cr coating.23:T487,Ultrasonic treatment has significant effects on the solidified microstructure, which includes grain structure, distribution of inclusions, refinement of secondary phases, etc. The primary causes are due to ultrasonic cavitation, acoustic streaming and movement of dislocations associated with propagation of ultrasound waves in media. However, the mechanism of how those effects happen are not fully understood and quantified. In this research, molten A356 alloy was treated with high power ultrasound at a frequency of 18 kHz, and then at relatively high superheat, the melt was cast into a permanent metal mold which complies with ASTM B108-02. The relatively high superheat condition is similar to one used in the standard foundry practice. The selected parameters for the ultrasonic stirring technology (UST) were determined by using a UST model that was recently developed and validated. The ultrasonically-stirred A356 alloy shows superior microstructure characteristics with very low micro-porosity levels. The microstructure and mechanical properties of the A356 alloy processed with and without UST were analyzed and compared in detail in this paper.24:T4af,In this exposure, pure and aluminium (Al)doped chromium (III) oxide (Cr₂O₃) nanoparticles are synthesized by simple solvothermal microwave irradiation (SMI) technique. SMI technique is simple and low cost; it has the future to be produced on a huge scale. The effect of dopant (Al) concentration on the struc

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