Kuntal Maiti | Indian Institute Of Technology, Roorkee (original) (raw)
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Papers by Kuntal Maiti
… and Properties of Advanced Ceramics and …, 2011
... Kuntal Maiti, Anjan Sil Department of Metallurgical and Materials Engineering Indian Institut... more ... Kuntal Maiti, Anjan Sil Department of Metallurgical and Materials Engineering Indian Institute of Technology Roorkee, Roorkee - 247667, Uttarakhand ... and Properties of Advanced Ceramics and Composites III Edited by Narottam P. Bansal, Jitendra P. Singh, Jacques Lamon and ...
Processing and Properties of Advanced Ceramics …, Jan 1, 2011
Journal of Ceramic Processing Research, Jan 1, 2010
Ceramics International, Jan 1, 2011
Al 2 O 3 /SiC ceramic composites with Y 2 O 3 as an additive, was synthesized using the Taguchi m... more Al 2 O 3 /SiC ceramic composites with Y 2 O 3 as an additive, was synthesized using the Taguchi method of design of experiments, so as to develop statistically sound input output relationships. The proportion of SiC was varied from 12 to 21 vol.% whereas that of Y 2 O 3 was varied from 2.5 to 4 vol.%. The composites were sintered at 1500 8C for a soaking time period of 12 h in an air atmosphere. Cracks were induced on the composite surface using a Vickers indenter with a load varying between 20 and 40 kg. Fractographical analyses have been carried out using optical and/or scanning electron microscopy to investigate the surface crack propagation behavior. Thermal aging at 1300 8C in the time range of 0.5-12.5 h was applied to find optimal conditions for healing of the pre-cracked samples. The output parameters such as crack length, healed crack length, hardness and fracture toughness of the samples were correlated with appropriate inputs such as contents of SiC and Y 2 O 3 , crack-healing temperature, healing time, compaction pressure, indentation load using statistical analysis. Further, the extent of influence, exerted by pertinent input parameters on output parameters, was also identified. #
Ceramics International, Jan 1, 2011
Ceramic composites in undoped Al 2 O 3 -5 wt% ZrO 2 (AZ) and doped with rare earth elements Y, La... more Ceramic composites in undoped Al 2 O 3 -5 wt% ZrO 2 (AZ) and doped with rare earth elements Y, La separately and simultaneously were prepared by solid state sintering process. These composites were characterized for microstructural investigation and determination of phase formation to draw a possible relationship between these characterization results with the fracture toughness measured by single-edge precracked beam (SEPB) test method using three-point bend test. The fracture toughnesses of Y and Y + La doped AZ are found to be higher for samples sintered at 1700 8C for long soaking times, than that of La doped and undoped AZ composites. It is predicted from the XRD and EDS analyses that the phases of Zr 0.88 Y 0.12 O 1.94 and Zr 0.935 Y 0.065 O 1.968 are formed at or near the intergranular region and therefore the higher fracture toughness of Y and Y + La doped AZ composites compared to undoped AZ and La doped AZ composite for samples sintered at 1700 8C for long soaking times, is attributed to these intergranular phases. #
Ceramics International, Jan 1, 2010
… and Properties of Advanced Ceramics and …, 2011
... Kuntal Maiti, Anjan Sil Department of Metallurgical and Materials Engineering Indian Institut... more ... Kuntal Maiti, Anjan Sil Department of Metallurgical and Materials Engineering Indian Institute of Technology Roorkee, Roorkee - 247667, Uttarakhand ... and Properties of Advanced Ceramics and Composites III Edited by Narottam P. Bansal, Jitendra P. Singh, Jacques Lamon and ...
Processing and Properties of Advanced Ceramics …, Jan 1, 2011
Journal of Ceramic Processing Research, Jan 1, 2010
Ceramics International, Jan 1, 2011
Al 2 O 3 /SiC ceramic composites with Y 2 O 3 as an additive, was synthesized using the Taguchi m... more Al 2 O 3 /SiC ceramic composites with Y 2 O 3 as an additive, was synthesized using the Taguchi method of design of experiments, so as to develop statistically sound input output relationships. The proportion of SiC was varied from 12 to 21 vol.% whereas that of Y 2 O 3 was varied from 2.5 to 4 vol.%. The composites were sintered at 1500 8C for a soaking time period of 12 h in an air atmosphere. Cracks were induced on the composite surface using a Vickers indenter with a load varying between 20 and 40 kg. Fractographical analyses have been carried out using optical and/or scanning electron microscopy to investigate the surface crack propagation behavior. Thermal aging at 1300 8C in the time range of 0.5-12.5 h was applied to find optimal conditions for healing of the pre-cracked samples. The output parameters such as crack length, healed crack length, hardness and fracture toughness of the samples were correlated with appropriate inputs such as contents of SiC and Y 2 O 3 , crack-healing temperature, healing time, compaction pressure, indentation load using statistical analysis. Further, the extent of influence, exerted by pertinent input parameters on output parameters, was also identified. #
Ceramics International, Jan 1, 2011
Ceramic composites in undoped Al 2 O 3 -5 wt% ZrO 2 (AZ) and doped with rare earth elements Y, La... more Ceramic composites in undoped Al 2 O 3 -5 wt% ZrO 2 (AZ) and doped with rare earth elements Y, La separately and simultaneously were prepared by solid state sintering process. These composites were characterized for microstructural investigation and determination of phase formation to draw a possible relationship between these characterization results with the fracture toughness measured by single-edge precracked beam (SEPB) test method using three-point bend test. The fracture toughnesses of Y and Y + La doped AZ are found to be higher for samples sintered at 1700 8C for long soaking times, than that of La doped and undoped AZ composites. It is predicted from the XRD and EDS analyses that the phases of Zr 0.88 Y 0.12 O 1.94 and Zr 0.935 Y 0.065 O 1.968 are formed at or near the intergranular region and therefore the higher fracture toughness of Y and Y + La doped AZ composites compared to undoped AZ and La doped AZ composite for samples sintered at 1700 8C for long soaking times, is attributed to these intergranular phases. #
Ceramics International, Jan 1, 2010