Penelitian nitrokarburisasi austenilik unluk baja AISI 1013 dan AISI P20 telah dilakukan padapenelitian in! dengan temperatur proses 600 °C sampai 700 °C.Penelitian dilakukan pada dapur fluidised bed, dengan komposisi 64 % N112, 20 % N2 dan 16 % LPG. Hasil karaklerisasi lerhadap ketebalan lapisan yang terbenluk, lerlihat ketebalan lapisan senyawa pada baja AISI 1013 lebih besar dibandingkan …
We report about microscopic study of electrical transport of polyc/ystalline Silicon (poly-Si) thin films for solar cells produced by very high frequency (VHF) plasma enhanced chemical vapor deposition using a conductive scanning probe microscope (SPM) technique. Surface morphologv and local current images are simultaneously measured. for the poly-Si layers with a thickness, d. in the ran…
This paper introduces the use of a scanning electron microscope (SEM) to evaluate the insulation property of insulators by bombarding an insulator surface by an electron beam. A simple model is used to obtain the distribution of electric field on the bombarded surface and explain the occurring of a surface flashover in the form of a treeing. The duration of bombardment needed to initiate a tree…
This paper introduces the use of a scanning electron microscope (SEM) to evaluate the insulation property of insulators. An SEM may be used not only to observe a surface image but also to provide a fine electron beam for charging an uncoated-insulator surface at once. The distribution of electric field created by the surface charging can be developed by a simple model. The inc…
Effect of CaO addition up to 10 wt% on the microstructural, mechanical and dielectric properties of a high purity MgO was studied. The fracture surface of the different addition of CaO was observed and the bending strength and surface breakdown under electron bombardment were determined. The effect of CaO addition was discussed according to the changes in the mi…
Materials stress under such irradiation can be found in space craft and industrial electronics. This paper introduces the use of a scanning electron microscope (SEM) to evaluate the insulation property of insulators An SEM may be used not only to observe a surface image but also to provide a fine electron beam for charging an uncoated-insulator surface at …
Abstract-This paper investigates the induced angular distortions due to single pass welding process on butt joint. The workpiece material is low Carbon steel with the dimension of 100 mm x 150 mm x 4 mm (w x I x t). Two different FE methods were investigated to analyze the distortion, namely based on linear thermo-elastic shrinkage using WELD PLANER Ver. 1.2 and based on thermo-elastic plasti…
Abstract- Duplex stainless steels (DSS) which comprise dual microstructure consisting of phase balance of austenitic phase ('y phase) and ferritic phase (a phase) have been an area of interest for researchers, stainless steel producers, fabricators and end users. This paper gives a brief review on low temperature surface heat treatment processes of nitriding,Carburizing and nitrocarburiz…
Nitrocarburising, a surface heat treatment of steels, has been widely recognized in steel manufacturing industries to improve scuffing resistance and fatigue resistance of the steel components. Several techniques of diffusing nitrogen and carbon into the surface of steel are categorised by use of salt bath, gaseous, and glow discharge atmospheres, The formation of iron carbonitride (Fe2_3N, C) …
Abstract-This paper investigates the capability of linear thermoelastic and thermoelastic plastic numerical analysis methods to estimate the welding deformations that occurred due to GMAW process which nowadays becomes an important manufacturing process in modern industries. As already known, distortion is considered as the major stumbling block that can affect the dimensional accuracy and t…