A Study on Laser Processing of Ceramic Surface

Year 2019, Volume: 45 Issue: 1, 88 - 94, 30.04.2019

Mehmet Hakan Çolpan

Abstract

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

Abstract

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.

Keywords

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

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• 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.
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