http://localhost:8080/xmlui/handle/123456789/1065 2026-04-26T08:51:36Z 2026-04-26T08:51:36Z Kumaran, S.S. Sekhar, K.C Preetam, A. Prabu, S.B. http://localhost:8080/xmlui/handle/123456789/3285 2025-05-29T05:18:05Z 2011-01-01T00:00:00Z

Title: Fabrication of Al2O3 based ceramic matrix composite by conventional sintering and Sol-Gel process Authors: Kumaran, S.S.; Sekhar, K.C; Preetam, A.; Prabu, S.B. Abstract: Alumina (Al2O3) matrix composites reinforced with 10%, 20% and 40% of 10µm size aluminum particles were fabricated by two processes, namely cold pressing and sintering process and Sol-Gel process. Al2O3, Al, 5% volume fraction of cobalt was mixed together, compacted and then sintered at 400-500oC for 30 minutes to fabricate the CMC. In the Sol-Gel fabrication route the Al2O3, Al, Co were blended with water and aged for 2-3 days to remove all the moisture and to enable oxidation of Al reinforcement. The mixture was cold pressed and sintered at 400-500oC to produce the CMC. The composition analysis of the CMC carried out by EDAX clearly showed that Al2O3 particles were formed by oxidation of Al reinforced in the matrix, effectively forming Al2O3/Al2O3 particulate reinforced ceramic matrix composite. The nature of the bonding at the interface was characterized using Scanning Electron Microscopy (SEM). The amount of porosity was determined using image analyzer based on ASTM B 276 standard. The average micro hardness of the samples was measured. The optimum volume fraction of aluminum for better interface bonding and reduced porosity was determined using the results obtained. Description: NITW

2011-01-01T00:00:00Z Kumar, A. Devaraju, A. Kotiveerachari, B. http://localhost:8080/xmlui/handle/123456789/3265 2025-05-07T04:59:25Z 2013-12-01T00:00:00Z

Title: Wear and mechanical properties of 6061-T6 aluminum alloy surface hybrid composites [(SiC + Gr) and (SiC + Al2O3)] fabricated by friction stir processing Authors: Kumar, A.; Devaraju, A.; Kotiveerachari, B. Abstract: In this investigation, the influence of tool rotational speed on wear and mechanical properties of aluminum alloy based surface hybrid composites fabricated via Friction stir processing (FSP) was studied. The fabricated surface hybrid composites have been examined by optical microscope for dispersion of reinforcement particles. Microstructures of all the surface hybrid composites revealed that the reinforcement particles (SiC, Gr and Al2O3) are uniformly dispersed in the nugget zone. It was observed that the microhardness decreases when increasing the rotational speed and showed higher microhardness value in Al–SiC/Al2O3 surface hybrid composite due to presence and pining effect of hard SiC and Al2O3 particles. It was also observed that high wear resistance exhibited in the Al–SiC/Gr surface hybrid composites due to presence of SiC and Gr acted as load bearing elements and solid lubricant respectively. The observed wear and mechanical properties have been correlated with microstructures and worn micrographs. Description: NITW

2013-12-01T00:00:00Z Selvaraj, N. http://localhost:8080/xmlui/handle/123456789/3137 2025-02-05T11:13:17Z 2011-07-01T00:00:00Z

Title: Application of Simulation Model for Distributed Scheduling Problems in FMS Authors: Selvaraj, N. Abstract: The main objective of this paper is to study the Distributed Scheduling (DS) problems in Flexible Manufacturing System (FMS) environment using simulation model. This FMS is assumed to be single factory and multi factory which are analyzed by production capacity, throughput, utilization and work-in-process (WIP) by considering scheduling rules. The rules which are includes Largest processing time (LPT), shortest processing time (SPT), first come first serve (FCFS) and last come first serve (LCFS). Finally these rules are compared with each other and concluded that which rule is better than others with respect to performances in the view of single factory and multi factory. Further the author has suggested future research works too Description: NITW

2011-07-01T00:00:00Z Mathur, A. Vikas, D.H Kale, S.R. http://localhost:8080/xmlui/handle/123456789/3089 2025-02-04T06:13:13Z 2011-01-01T00:00:00Z

Title: An Experimental Study on Burning of Vertical Cloth Panels Authors: Mathur, A.; Vikas, D.H; Kale, S.R. Abstract: In many countries, tents are used for public gatherings. In India they are known as shamiana and are custom-made and assembled and disassembled on site in a short time. The structure consists of a metal or wood frame that is covered by fabric panels to produce a closed, open or semi-open structure. Fires in these structures are frequent and spread rapidly resulting in considerable loss of life. In this study, vertical panels of fabrics used in typical shamiana construction were tested for burning characteristics with a nichrome wire ignition as ignition source placed at two locations, viz., bottom center or top center. The process was video taped; individual images were analyzed for flame and char parameters. Bottom ignition of cotton panel results in rapid vertical spread whereas with top ignition the burning process is much slower with vertical burning velocities being 9.0 and 0.2 cm/s, respectively; the horizontal burning velocities were similar at 1.1 cm/s for both. With bottom ignition, polyester burning results in a regular fall of burning globules to the ground and the spread rate is 2.0 cm/s and 1.0 cm/s in vertical and horizontal directions, respectively. With top ignition, the burning rate is 1.6 cm/s in vertical direction and 1.8 cm/s in horizontal direction. With bottom ignition, the vertical and horizontal flame accelerations are 0.4 and 0.3 cm/s2, respectively. For polyester, the vertical accelerations are much smaller (0.05 cm/s2) during the initial part followed by a very small deceleration. Description: NITW

2011-01-01T00:00:00Z