Search Results

Solution route precipitation technique was opted to synthesize the nanostructured copper tungstate by the incorporation of cupric ion solution to the aqueous sodium tungstate reagent. The size and surface of the synthesized nanostructured material is highly influenced by the concentration of cuprous ion as well as the tungstate solution. The structural pattern and chemical composition of CuWO4 nanoparticles were analysed by powder XRD and FESEM with EDX spectrum. The powder XRD and EDX pattern confirmed the elemental composition of the synthesized samples. FESEM images indicated that the particle was present in random size distribution. At 298 K, water vapour pressure thermostat was achieved in the range from 5% to 98% as a relative humidity (RH). By providing the DC conductance measurement as a relative humidity, the humidity sensing nature of the material was investigated and the sensitivity factor (Sf) value of the prepared CuWO4 was calculated at 298K (Sf=9640±100).

Productivity plays a vital role in manufacturing processes as well as in service. Sheet metal bending process is a type of forming process that has been used by the wide range in industries. There are several tangible and intangible factors affecting the production rate during the bending process. Spring back is one of the severe factors which affects the production rate, especially in stainless steel material. The spring back is mostly affected by material properties, sheet thickness, bending radius, die sizes and component geometry. In this paper, the spring back is studied by the effect of various parameters such as rectangle/oblong slots with varying pitch distance and without slots and bending time in the stainless-steel material 304 grade in V-air bending machine. The experimental data are evaluated by means of the Response Surface Method (RSM). Finally, it was observed that explored results have the betterment of the production rate with connection to spring back.

In recent years, asbestos and copper free brake pads have attracted researchers due to its adverse environmental risks which requires manufacturers to seek a suitable replacement. It is essential to identify new combination of synthetic and natural fibers for the potential automotive brake pads. Experiments were planned to produce various frictional composites by using additives like carbon fiber and basalt fiber with standard additional ingredients like binders, fillers, abrasives and lubricants through hot pressing technique. Here binder act as epoxy resin is mixed with these frictional composites and graphite act as lubricant, vermiculite act as filler and alumina act as abrasives. The prepared form of polymer composite brake pad materials was tested as per ASTM and industrial standard practices like hardness, wear and friction followed by worn surface roughness were measured.