ABSTRACT
CONTENTS Abstract.................................................................................................................. 88 4.1 Introduction ................................................................................................. 88 4.2 Ceramic Materials....................................................................................... 90 4.3 Experimental Procedure ............................................................................ 90
4.3.1 Grinding ........................................................................................... 90 4.3.2 Grit Depth of Cut............................................................................ 91 4.3.3 Strength Testing .............................................................................. 91 4.3.4 Lapping ............................................................................................ 92 4.3.5 Grinding Procedure for Determining Ground Strength .......... 93 4.3.6 Grinding Procedure for Determining Damage Depth ............. 94
4.4 Results and Discussion .............................................................................. 96 4.4.1 Ground Strength ............................................................................. 96
4.4.1.1 HPSN Ceramic ................................................................. 96 4.4.1.2 RBSN Ceramic.................................................................. 97 4.4.1.3 Other Ceramics ................................................................ 99 4.4.1.4 Guidelines for Efficient High-Strength
Finish Grinding.............................................................. 101 4.4.1.5 Physical Meaning of Critical Grit Depth of Cut....... 101
4.4.2 Depth of Damage.......................................................................... 101 4.4.2.1 RBSN Ceramic................................................................ 101 4.4.2.2 Zirconia-Toughened Alumina Ceramic..................... 102 4.4.2.3 Strategy for Minimum Grinding Time ...................... 105
4.5 Conclusions................................................................................................ 105 References ........................................................................................................... 106
ABSTRACT Experimental grinding research has led to information regarding ground strength of the ceramic and depth of damage in the ceramic caused by grinding. Diamond wheel grit size and machine parameters of wheel depth of cut, workspeed, and wheelspeed in surface grinding were investigated. The investigated ceramic materials are hot-pressed silicon nitride, reaction-bonded silicon nitride, aluminum oxide, and silicon carbide. Results provide methodology to achieve maximum ground strength and to use damage depth information to minimize grinding time.
