a series of tialon coatings were synthesized in a gaseous mixture of argon, nitrogen and oxygen by cathodic arc evaporation method using a ti–al mosaic target. oxidation of coatings was carried out by heating the coated samples at the temperatures of 500, 600, 700, and 800°c for 1 h in air atmosphere. it was found that heat treatment changed the microstructure and composition of the coating. th...

reaction constants and heat release during thermophilic aerobic digestion of typical secondary and mixed sludges were determined. maximum reaction constant, determined by measuring the amounts of biodegradable volatile suspended solids (bvss) removed, occurred in the temperature range of 55-60 ºc. measurement of heat releases were carried out, at the same range, by the aid of a temperature prog...

The influence of alloying elements and heat treatment on the microstructure mechanical behaviors extruded Mg–Gd–Nd ternary alloys was investigated in this study. grain sizes dramatically decreased after extrusion, particles which distributed Mg matrix had great effect size. from 26 to 5 ​μm with content increasing. test results show that both Gd Nd positive hardness, yield strength Young's modu...

INTRODUCTION Climate change and rapid population ageing are significant public health challenges. Understanding which health problems are affected by temperature is important for preventing heat and cold-related deaths and illnesses, particularly in the elderly. Here we present a systematic review and meta-analysis on the effects of ambient hot and cold temperature (excluding heat/cold wave onl...

GRATZEL and R. VÖLKL, Metall. Mater. Trans., 2005, 36A, 681–689 Pt-base alloys (1) with various contents of Al, Cr and Ni were arc melted. Solution heat treatments at 1450oC followed by water quenching gave single phase alloys. Ageing at 1000oC caused the precipitation of L12 ordered particles. (1), comprising (in at.%): 11 Al; 3 Cr; 6 Ni and balance Pt, had cuboidal precipitates with edge leng...

BACKGROUND Calcium sulphate (CS) has been used in bone grafting since the 1800s. It has not replaced autograft as the gold standard, however, since its dissolution occurs rapidly in bodily fluids, meaning that the material cannot support long-term bone growth. Here, the polymer poly (ether ether ketone) (PEEK) was used to slow dissolution in in vitro physiological environments and augment the m...

in the present study, the capability of accumulative roll bonding (arb) and subsequent heat-treatment to fabricate solid solution from a multilayered cu/zn/al was investigated. two post-heat treatment (one-step and two-step) routes were proposed. in the first, the arb processed material was heated to 800 c for 5:30 hours and allowed to cool slowly in a furnace (one-step route). in the second (t...

Using the calculation of phase diagrams approach and Scheil solidification modeling, Al-2.5Mg-1.0Ni-0.4Sc-0.1Zr alloy was designed, intentionally with an extraordinarily high cracking susceptibility, making it prime for during laser powder bed fusion. This study demonstrates ability to mitigate even most extreme tendencies in aluminum alloys only minor alloying additions Sc Zr, 0.5 wt.% max. Fu...

Power compensation DSC has been employed to detect and analyse precipitation reactions in an Al1.3Mg-0.4Mn and an Al-1.3Mg-0.4Mn-0.07Cu alloy in which very small amounts of precipitate, less than 0.3 at%, are expected to form. Due to the very small heat effects, baseline instability and drift significantly interfere with the measurements. After repeated experiments and careful baseline correcti...