๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Temperature history for cutting of ceramics preheated by a CO2 laser

โœ Scribed by C.Y. Ho; M.Y. Wen; J.E. Ho; D.Y. Chen

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
670 KB
Volume
192-193
Category
Article
ISSN
0924-0136

No coin nor oath required. For personal study only.

โœฆ Synopsis

Temperature history for cutting of ceramics preheated by a CO 2 laser is analytically investigated in this study. During the cutting of ceramics the laser is utilized to maintain the workpiece at a specified range of temperature, where the yield strength of ceramics can be reduced below the fracture strength, changing the material deformation behavior from brittle to ductile and enabling the use of a single point cutting tool to remove material at rates approaching those of metal cutting. Therefore accurate temperature analysis is needed to obtain high efficiency and quality of cutting of ceramics. Assuming the system to be two-dimensional for sufficiently high velocity of rotation (RPM) and the heat flux generated by cutting to be negligible in the process of cutting ceramics, the thermal model accounting for temperature history is developed. The results calculated by this model agree with the experimental data. The effects of feed rate and laser power on temperature history are discussed in this study.

๐Ÿ“œ SIMILAR VOLUMES

Cordectomy by CO2 laser or radiotherapy
Cordectomy by CO2 laser or radiotherapy for small T1a glottic carcinomas: Costs, local control, survival, quality of life, and voice quality
โœ Kim M. Goor; A. Jeanne G. E. Peeters; Hans F. Mahieu; Johannes A. Langendijk; C. ๐Ÿ“‚ Article ๐Ÿ“… 2007 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 136 KB ๐Ÿ‘ 1 views

## Abstract ## Background. The clinical results of radiotherapy and endoscopic cordectomy for T1a glottic carcinoma are reported to be similar, but costs of both treatments may differ. Therefore, we retrospectively evaluated the costs, voice quality, quality of life, and clinical results of both t

Room-temperature rate constants for the
Room-temperature rate constants for the gas-phase quenching of metastable molecular oxygen, O2(a 1 ฮ”g) and O2(b 1 ฮฃg+), by CO2, N2O, NO, NH3, HCl and SO2
โœ Razmik B Boodaghians; Patricia M. Borrell; Peter Borrell ๐Ÿ“‚ Article ๐Ÿ“… 1983 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 402 KB

The rate constants for collisional quenching of Oz(b 'x:) by COz, NzO. NO, NHs\_ HCl and SOz. and of Oz(a '+.I by NO. NH3 and HCl have been measured at room tempera& by studying 'he emissions of singlet moleculx a\pg.en at 762 and 634 nm in D flowing discharge. The rate constant for deactivation of