Differ between reaction bonded silicon nitride and hot pressed silicon nitride.
[3 marks]Explain the engineering applications of alumina.
[4 marks]Explain why a metal shows a ductile fracture but a polycrystalline ceramic or an ionic solid does show a brittle fracture.
[7 marks]Define carbonitride based cermet.
[3 marks]Define Titanium carbide based cermet.
[4 marks]Why commercial titanium carbonitride based cermets are preferred over titanium carbide based cermets?
[7 marks]Why too little or too much chromium addition is detrimental for titanium carbonitride based cermets?
[7 marks]Why is boron carbide so hard material?
[3 marks]Describe methods of synthesis of Boron Carbide in detail.
[4 marks]Astrong metal-ceramic bond is essential for a satisfactory cermet production’- explain.
[7 marks]Describe features of cermet.
[3 marks]Describe in detail the most commonly used production routes of cermets.
[4 marks]Describe in detail the different preparation routes for the synthesis of titanium carbonitride.
[7 marks]Define spontaneous polarization.
[3 marks]Describe different polymorphs of BaTiO with schematic.3
[4 marks]Describe methods of synthesis of Silicon Carbide in detail.
[7 marks]Discuss why zirconia has much toughness index.
[3 marks]Describe polymorphic forms of zirconia.
[4 marks]Describe the mechanism of transformation toughening in Zirconia.
[7 marks]Define an implant material.
[3 marks]Describe carbon based implant materials in detail.
[4 marks]Define fracture toughness. Explain why a FCC nickel crystal shows a higher value of Critical Resolved Shear Stress whereas a HCP zinc crystal shows a lower value.
[7 marks]Define composite material.
[3 marks]Describe applications of ceramic composites.
[4 marks]Describe synthesis and applications of Cermet materials.1
[7 marks]