36 research outputs found
Numerical modeling of microwave heating
No full textThe present study compares the temperature distribution within cylindrical samples heated in microwave furnace with those achieved in radiatively-heated (conventional) furnace. Using a two-dimensional finite difference approach the thermal profiles were simulated for cylinders of varying radii (0.65, 6.5, and 65 cm) and physical properties. The influence of susceptor-assisted microwave heating was also modeled for the same. The simulation results reveal differences in the heating behavior of samples in microwaves. The efficacy of microwave heating depends on the sample size and its thermal conductivity
Not Available
No full textNot AvailableThis paper describes a study on the variability of rainfall in Patna Canal command using daily rainfall data for 32 years. Two parameter Gamma probability distribution model was observed to fit well in the analyzed data. Results showed that weekly and monthly variation values in rainfall in the head, middle and tail reaches in the Patna Main Canal are significant. The study is useful for better planning about the release of water from the canal for irrigation.Not Availabl
Powder injection molding and sintering of austenitic stainless steel
No full text306-313This paper
describes powder metallurgy (P/M) processing approach to consolidate ferrous
alloys for automotive applications. The net shape and corrosion/oxidation
requirements in automotive components, such as exhaust flanges, necessitate P/M
processing route giving the advantage of alloying flexibility and precision
manufacturing. One variant of P/M processing is powder injection molding
(PIM) where complex-shaped components on a large scale are fabricated. In this
study, experiments were performed on 316L stainless steels using compacts
shaped by pressing and powder injection molding (PIM). In the conventional
process, the austenitic stainless steel compacts were solid-state sintered at
1250°C and supersolidus liquid phase sintered (SLPS) at 1400°C. The
injection molded 316L stainless steel feedstock were Injected,
thermally debound and sintered. The rheological behavior of the binder was
investigated through in situ imaging. Density of the stainless
steel samples sintered by supersolidus liquid phase sintering was higher than
the solid-state sintered samples. The effect of sintering temperature on the
microstructural evolution was characterized. The PIM stainless steel components
attained nearly full density with a uniform shrinkage
