A Study on Laser Processing of Ceramic Surface

Yıl 2019, Cilt 45, Sayı 1, 88 - 94, 30.04.2019

Mehmet Hakan ÇOLPAN

Öz

In this study, laser processing processes of alumina ceramics were investigated. The effect of laser power and processing speed on alumina samples was investigated in this laser treatment procedure. The main benefits of laser processing are flexibility, high speed, high precision and good quality. In addition, ceramics are hardly processed by conventional methods due to their high hardness and brittleness. CO₂ laser processing alumina ceramics were analyzed for the effect of output power, process speed parameters. Mark width, sign depth, and contrast were evaluated and the output power determined both the sign depth and width. Higher power, resulting in deeper and wider markings characterized by high contrast. The processing speed controls overlapping stains and the duration of the laser-material interaction, thus having an effect on the depth and contrast of the markers. The study explained that high output forces are required to produce deep lines and that, with low processing speeds, high output forces become clear as the most suitable parameters for achieving a satisfactory quality width and depth during engraving. Samples were analyzed using a confocal microscope and SEM.

Seramik Yüzeylerin Lazerle İşlenmesi Üzerine Bir Çalışma

Öz

Bu çalışmada, alümina seramiklerinin lazerle işleme süreçleri araştırılmıştır. Bu lazer işleme prosedüründe lazer gücü ve işlem hızının alümina örnekleri üzerindeki etkisi incelenmiştir. Lazer işlemenin başlıca faydaları esneklik ile birlikte yüksek hız, yüksek hassasiyet ve iyi kalitedir. Ayrıca, seramikler yüksek sertlikleri ve kırılganlıkları nedeniyle geleneksel yöntemlerle zorlukla işlenir. CO₂ lazer işleme alümina seramiklerinin, çıkış gücü, işlem hızı parametrelerinin etkisi ile ilgili analizleri yapıldı. İşaret genişliği, işaret derinliği ve kontrast değerlendirildi ve çıktı gücünün hem işaret derinliğini hem de genişliği belirlediği tespit edildi. Daha yüksek güç, yüksek kontrast ile karakterize edilmiş, bu durum daha derin ve daha geniş işaretlerin oluşmasına neden olmuştur. İşlem hızı, üst üste binen lekeleri ve lazer-malzeme etkileşim süresini kontrol eder, böylece işaret derinliği ve kontrastı üzerinde etkisi olur. Araştırma, derin çizgiler üretmek için yüksek çıkış güçlerinin gerekli olduğunu ve düşük işlem hızlarıyla birlikte yüksek çıkış güçlerinin, gravürleme sırasında tatmin edici kalitede genişliği ve derinliği elde etmek için en uygun parametreler olduğu neticesinde netleştiğini açıkladı. Örnekler konfokal mikroskop ve SEM kullanılarak analiz edildi.

Anahtar Kelimeler

Alümina seramik (Al2O3), lazer yüzey işleme, CO2 lazer

Kaynakça

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• Chen, M. F., Hsiao, W. T., Huang, W. L., Hu, C. W., & Chen, Y. P. (2009). Laser coding on the eggshell using pulsed-laser marking system. Journal of Materials Processing Technology, 209(2), 737–744.
• Garino, J., Rahaman, M. N., & Bal, B. S. (2006). The Reliability of Modern Alumina Bearings in Total Hip Arthroplasty. Seminars in Arthroplasty, 17(3–4), 113–119.
• Gómez De Salazar, J. M., Soria, A., & Barrena, M. I. (2007). The effect of N2 addition upon the MIG welding process of duplex steels. Journal of Materials Science, 42(13), 4892–4898.
• Leone, C., Lopresto, V., & De Iorio, I. (2009). Wood engraving by Q-switched diode-pumped frequency-doubled Nd:YAG green laser. Optics and Lasers in Engineering, 47(1), 161–168
• Maleksaeedi, S., Eng, H., Wiria, F. E., Ha, T. M. H., & He, Z. (2014). Property enhancement of 3D-printed alumina ceramics using vacuum infiltration. Journal of Materials Processing Technology, 214(7), 1301–1306.
• Migiakis, K., & Papadimitriou, G. D. (2009). Effect of nitrogen and nickel on the microstructure and mechanical properties of plasma welded UNS S32760 superstainless steels. Journal of Materials Science, 44(23), 6372–6383.
• Sorrentino, S., Fersini, M., & Zilli, G. (2009). Comparison between SAW and laser welding processes applied to duplex structures for bridges. Welding International, 23(9), 687–698.
• Turichin, G., Tsibulskiy, I., Kuznetsov, M., Akhmetov, A., Mildebrath, M., & Hassel, T. (2015). Influence of the Gap Width on the Geometry of the Welded Joint in Hybrid Laser-Arc Welding. Physics Procedia, 78(August), 14–23.
• Vogt, U. F., Gorbar, M., Dimopoulos-Eggenschwiler, P., Broenstrup, A., Wagner, G., & Colombo, P. (2010). Improving the properties of ceramic foams by a vacuum infiltration process. Journal of the European Ceramic Society, 30(15), 3005–3011.