Handbook of Advanced Ceramics Machining Episode 1 ppsx

[...]... 2.5 µm FIGURE 1. 11 SEM micrograph of ductile scratching made on surface of GOE 91 (in process) Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C0 01 Final Proof page 14 6 .10 .2006 2:05am Handbook of Advanced Ceramics Machining 14 Scratching groove Scratching chip FIGURE 1. 12 SEM micrograph of ductile scratching made on surface of GOE 91 (after process) GOE 91 Normal load (mN) 1 Plastic zone... 8 10 12 Scratching force (mN) 1. 5 Steady-s tate proc 1 ess e ic zon Plast 0.5 Chip removed point 0 −0.5 0 2 4 6 Time (sec) 8 10 12 FIGURE 1. 13 Force data measured during ductile scratching test on surface of GOE 91 (see Figure 1. 11) Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C0 01 Final Proof page 15 6 .10 .2006 2:05am Ductile Grinding of Ceramics: Machine Tool and Process 15 TABLE 1. 2... Marinescu /Handbook of Advanced Ceramics Machining 3837_C0 01 Final Proof page 1 6 .10 .2006 2:05am 1 Ductile Grinding of Ceramics: Machine Tool and Process H Eda CONTENTS 1. 1 Ceramics and Metals 1 1.2 Brittle Materials and Grinding 4 1. 3 In-Site Observation of Ductile Behavior in Ceramics 9 1. 3 .1 Scratch at the Brittle-Mode 9 1. 3.2 In-Site Observation of the Ductile Mode 10 1. 4 Ductile-Mode... F6 SK7 GOE 91 TRC 5 E=H R (Pa m) dci (nm) (Indentation) dcg (nm) (Grinding) 11 .94 20 .1 8 .18 54.5 14 .27 25.3 9.78 65.2 14 .25 35.5 18 .33 12 0 15 .45 43.3 19 .66 13 1 14 .27 21. 1 7.23 48.2 12 .77 28.69 6.48 43.2 1. 4 Ductile-Mode Grinding of Ceramics The current technology for ductile-mode grinding is indebted to the works mainly by Syn and Taylor9, Blackley and Scattergood10, and Bifano and Fawcett .11 According... Marinescu /Handbook of Advanced Ceramics Machining 3837_C0 01 Final Proof page 8 6 .10 .2006 2:05am Handbook of Advanced Ceramics Machining 8 Tension Compression FIGURE 1. 6 Stress distribution in the workspace during cutting (undeformed chip thickness is 1 mm) Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C0 01 Final Proof page 9 6 .10 .2006 2:05am Ductile Grinding of Ceramics: Machine Tool and... Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page xiv 18 .10 .2006 6:35pm 11 Double Fracture Model in Lapping of Ceramics 257 I.D Marinescu 12 Double Side Grinding of Advanced Ceramics with Diamond Wheels 263 C.E Spanu, I.D Marinescu, and M Hitchiner 13 Super Polishing of Magnetic Heads 283 ´ J Ramırez-Salas and I.D Marinescu 14 Laser-Assisted Grinding of Ceramics. .. Ceramic 53 .1 59.0 80.2 82.2 95.8 TRC 5 (Glass II) 10 8.3 4.44 4 .14 5.62 5.32 6. 71 8.48 30 .18 2.83 22 35.63 1. 98 24 .1 45.74 2.63 33.2 58.20 2.62 32.5 64.03 3.32 38.3 60.30 5.02 45 .1 0.3 0.38 0.38 0.49 0.39 1. 56 0.22 3740 0.20 2520 0.26 3 510 0.25 2550 0.20 2980 0.27 2550 57 544 96 524 86 760 76 725 47 880 52 727 503 420 542 4 21 728 603 0.93 0.82 1. 04 0.83 1. 62 1. 31 515 473 624 699 — 9 61 6 4 2 2 1 2 3 1 1 2 4... Figure 1. 12, the chips are visibly generated Over the scratching process, the normal force Fn and the scratching force Ft applied to the indenter are Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C0 01 Final Proof page 12 6 .10 .2006 2:05am Handbook of Advanced Ceramics Machining 12 Indentation cavity Lateral crack FIGURE 1. 8 SEM micrograph of brittle indentation made on surface of TRC... size and shape of the chips The above-mentioned critical depth -of- cut Scratching groove Pitting due to lateral cracks FIGURE 1. 9 SEM micrograph of brittle scratch made on surface of TRC 5 Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C0 01 Final Proof page 13 6 .10 .2006 2:05am Ductile Grinding of Ceramics: Machine Tool and Process 13 TRC 5 Normal load (mN) 1. 5 1 0.5 0 −0.5 0 1 2 3 4 5 6... serrate shape on the groove 1. 3.2 In-Site Observation of the Ductile Mode Knowing the indenter geometry, the average pressure Ptip on the indenter surface during the scratching is simply given as Ioan D Marinescu /Handbook of Advanced Ceramics Machining 3837_C0 01 Final Proof page 11 6 .10 .2006 2:05am Ductile Grinding of Ceramics: Machine Tool and Process 11 TABLE 1. 1 Properties of Glasses Materials Properties . alt="" HANDBOOK OF ADVANCED CERAMICS MACHINING Ioan D. Marinescu /Handbook of Advanced Ceramics Machining 3837_C000 Final Proof page i 18 .10 .2006 6:35pm Ioan D. Marinescu /Handbook of Advanced Ceramics. Ceramics 9 1. 3 .1 Scratch at the Brittle-Mode 9 1. 3.2 In-Site Observation of the Ductile Mode 10 1. 4 Ductile-Mode Grinding of Ceramics 15 1. 5 Machine Tools for Ductile Grinding of Ceramics 18 1. 5 .1 Design. Ceramics Machining 3837_C000 Final Proof page ii 18 .10 .2006 6:35pm HANDBOOK OF ADVANCED CERAMICS MACHINING E DITED BY IOAN D. MARINESCU Ioan D. Marinescu /Handbook of Advanced Ceramics Machining