We have performed a comprehensive study into low temperature ( 500 °C) internal gettering in multicrystalline silicon (mc-Si). Two groups of as-grown mc-Si wafers from different ingot height positions were subjected to the same thermal treatments with surface passivation by either silicon nitride (SiNx:H) or a temporary iodine-ethanol (I-E) chemical solution . With either passivation scheme, l...

In the present study, M2 high speed steels were fabricated by using electro-slag rapid remelting process. Carbide structure was analysed and the fracture toughness and hardness were also measured after austenitization treatment at 1190 and 1210C followed by tempering treatment at 535C for billets with various diameters from 16 to 60 mm. Electro-slag rapid remelting (ESRR) process is an advanced...

The heat absorption method (HAM) was proposed to improve the quality of a large steel ingot. CaO–CaF2 inorganic material rods used reduce 5 K superheat 6-ton GCr15 molten steel. ingots with and without HAM compared. In comparison conventional casting, not only significantly alleviated A- V-segregation segregation levels carbon sulfur, but also reduced number inclusions shrinkage porosity zone i...

Abstract The realization of high strength copper-iron (Cu-Fe) alloy is related to its solidification structure. morphology and distribution characteristics Fe phase in the structure Cu-15Fe ingot were analyzed, deformation was compared. results show that cooling conditions can affect size, solidified average uniformity water-cooled copper mold (W-ingot) 0.45% higher than quartz (Q-ingot). quali...