Characterization of KDP Crystal Surfaces from Single Point Diamond Milling

Abstract:

Potassium Dihydrogen Phosphate (KDP) crystal is widely used in laser frequency multiplications and electro-optical modulators, but its soft-brittle property and thermal sensitive characteristic make it a very difficult-to-machine material. In this paper, an in-house made diamond tool with one tooth is used to face-mill KDP crystal specimens on a high-speed micro CNC machining centre, based on a statistically designed experiment. The morphology and roughness of the milled KDP crystal surfaces are analyzed with respect to the process parameters. It has been found that cutting speed has the largest effect on surface roughness, while axial depth of cut and feed per tooth show a comparable effect on both the Ra and PV roughness measures. From this study, 3 m/s cutting speed, 3 μm axial depth of cut and 1 μm/z feed per tooth are recommended for single point diamond milling of KDP crystal.

• Periodical: Advanced Materials Research (Volume 1136)
• Pages: 271-276
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1136.271
• Online since: January 2016
• Authors: Guo Qiang Xu, Zeng Wen Liu*, Jun Wang, Chuan Zhen Huang
• Keywords: KDP Crystal, Milling, Surface Morphology, Surface Quality

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