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Purpose: The aim of this study is to determine the impact of aging time and temperature on the diffusion process of alloying elements inside alloyed copper CuCr0,7, CuFe2 and CuTi4. Design/methodology/approach: It was assumed the activation energy for diffusion of small interstitial atoms is smaller than for large substitute atoms. To determine the influence of aging time and temperature on diffusion...
Purpose: The investigation procedure and results of exploring the impact of deep cryogenic treatment on the wear resistance and microstructure of the X37CrMoV5-1 hot work steel. Design/methodology/approach: The wear resistance and microstructure of the X37CrMoV5-1 hot work steel. The wear resistance was measured at 400°C using the pin-on-disc method with a rotary tribometer. The microstructure of...
Purpose: The aim of the paper is to fabricate semi-transparent graphene oxide counter electrodes for dye-sensitized solar cells. Design/methodology/approach: A thermal reduction is applied to decreased the amount of surface oxygen functionalities on graphene sheets. For this purpose thermal treatments in oven in 250°C and 500°C were used. Graphene oxide materials were mixed with PEDOT:PSS and then...
Purpose: The paper presents results of structural and magnetic properties of Fe78Si11B11 and Fe78Si9B11Y2 alloys in the form of ribbons. The effect of addition of yttrium on the structure and magnetic properties was investigated. Design/methodology/approach: The investigated samples were prepared in the form of ribbons using the melt-spinning method. The material structures were investigated using...
Purpose: The main goal of present study is to investigate the connection of the effect of the heat treatment with severe plastic deformation using the ECAP (equal channel angular pressing) process and by application of precipitation treatment. Design/methodology/approach: Precipitation treatment was used to increase workability and mechanical properties of the investigated alloy. Two periods of solution...
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