RBSN ceramic

The ceramic materials investigated in this paper are hot-pressed silicon nitride (HPSN), reaction-bonded silicon nitride (RBSN), zirconia-toughened alumina (AI2O3), and porous SiC. The available material properties for these ceramics are given in Table 4.3. The HPSN and zirconia-toughened alumina ceramics were in the shape of flexural strength test bars cut from billets. The RBSN ceramic was molded into bars of the shape of flexural test specimens. The porous SiC ceramic was provided in the shape of flexural test specimens. 

For investigating ground strength of HPSN and RBSN ceramics, the grit sizes of the wheels employed are shown in Table 4.4. The wheels have a concentration of 150 and an uncoated diamond. The width and thickness of... 

For the grinding of RBSN ceramic, the test conditions employed for finish grinding are shown in Table 4.6. The machine parameter of width of grind was held constant at bi, = 1.59 mm. For test condition number 2 through... 

The grinding conditions used for finish grinding in this research are shown in Table 4.8 and Table 4.9. Table 4.8 is for the grinding conditions for RBSN ceramic and Table 4.9 is for the almnina ceramic. The grind directions were perpendicular to the direction of the tensile stress in the subsequent flexural strength test, which is groimd transverse to the length of the bar. 

Flexural strength as a function of grit depth of cut, (test condition number 1 through number 6), for RBSN ceramic. 

Flexural strength vs. depth of material removed by lapping for RBSN ceramic with original surface ground at (a) pm, (b) = pm, (c) fw = 0.29 pm,... 

Depth of damage determined by the lapping method for RBSN ceramic. 

Mayer, J.E. Jr., Fang, G.-P., and Edler, J.P., Grinding of reaction bonded silicon nitride (RBSN) ceramic. Manufacturing Science and Engineering, MED-Vol. 4, ASME, 1996, pp. 267-271. 

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