CC BY
13LP-PS-2
High removal rate laser machining of zirconia with nanosecond pulsed laser
D. Panov1, V.N. Perovskiy1, D.V. Ushakov1, A.S. Schekin1, E.D. Ishkinyaev1 1National Research Nuclear University MEPhI, Department of Laser Physics, Moscow, Russian Federation
Different ceramics has a lot of application in prosthetics. One of them is zirconia. This ceramic has an outstanding mechanic, thermal and optical properties [1]. This key factors made zirconia a widespread material in dentistry, especially in a prosthesis. Still, most dental prostheses are manufactured with conventional techniques like milling. However, nowadays, new ways of production dental prosthesis are developing. One of the most perspectives is laser machining. In prevues works, we considered the possibility of the technique with different laser sources [2]. It is
known, that nanosecond pulsed lasers are usable and low-cost laser sources. It can be used as the main source for laser machining of the prosthesis. In spite of this, the problem of low removal rate and structural changing under laser radiation exist. In this work, ways of obtaining the highest removal rate with low structural changing are considered. To obtain the highest removal rate, dependence removal rate, surface roughness on parameters of laser radiation and scanning system was studied. Structural changing of zirconia under laser processing is studied. HAZ ratio from laser flense was obtained.
References
[1] D. V. Ganin, S. I. Mikolutskiy, V. N. Tokarev, V. Yu. Khomich, V. A. Shmakov, V. A. Yamshchikov, "Formation of micron and submicron structures on a zirconium oxide surface exposed to nanosecond laser radiation", Kvantovaya Elektronika, 44:4 (2014).
[2] D. V. Panov, et al 2019 J. Phys.: Conf. Ser. 1238 012028.
