There are numerous needs for sensing, one of which is in pressure sensing for high temperature application such as combustion related process and embedded in aircraft wings for
reusable space vehicles. Currently, silicon based MEMS technology is used for pressure sensing. However, due to material properties the sensors have a limited range of approximately
600°C which is capable of being pushed towards 1000°C with active cooling. This can introduce reliability issues when you add more parts and high flow rates to remove large amounts of
heat. To overcome this challenge, sapphire is investigated for optical based pressure transducers at temperatures approaching 1400°C. Due to its hardness and chemical inertness,
traditional cutting and etching methods used in MEMS technology are not applicable. A method that is being investigated as a possible alternative is laser machining using a picosecond
laser. In this research, we study the material property changes that occur from laser machining and quantify the changes with the experimental results obtained by testing sapphire at
high-temperature with a standard 4-point bending set-up. Keywords: Sapphire, Bayesian analysis, thermomechanics, alumina / A Thesis submitted to the Department of Mechanical Engineering in partial fulfillment of the requirements for the degree of Master of Science. / Fall Semester 2015. / November 9, 2015. / Anisotropy, Laser ablation / Includes bibliographical references. / William S. Oates, Professor Directing Thesis; Rajan Kumar, Committee Member; Eric Hellstrom, Committee Member.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_291262 |
| Contributors | Bal, Harman Singh (authoraut), Oates, William S. (professor directing thesis), Kumar, Rajan (committee member), Hellstrom, Eric (committee member), Florida State University (degree granting institution), College of Engineering (degree granting college), Department of Mechanical Engineering (degree granting department) |
| Publisher | Florida State University |
| Source Sets | Florida State University |
| Language | English, English |
| Detected Language | English |
| Type | Text, text |
| Format | 1 online resource (55 pages), computer, application/pdf |
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