A two-parameter model for predicting thermal contact resistance between crystal and aluminum alloy based on turning morphology

Abstract

Thermal contact resistance (TCR) is a key factor in thermal engineering which affects the thermal-structural design of precision instruments. To reveal the influence of turning morphology on the TCR between potassium dihydrogen phosphate (KDP) crystal and aluminum alloy, a novel simplified model considering two parameters of wavelength and slope is proposed. Meanwhile, the TCR of KDP crystal and aluminum alloy are experimentally investigated to validate this two-parameter model, where the effects of different wavelengths and slopes on Mises stress distribution, temperature distribution, heat flux and TCR can be analyzed. By incorporating the theory of plane turning, the TCR can be reduced by controlling the feed rate and cutting thickness under a certain roughness. This research provides a theoretical basis for the thermal-structural design of crystal modules and the turning of aluminum alloy.

Ultra-Precision Cutting Mechanism of KDP Crystal in Microplastic Region via Heating Assistance

“…KH 2 PO 4 (KDP) crystals, which have interesting photophysical properties, such as piezoelectricity, dielectricity, and electro-optical properties, are optical materials with excellent performance. KDP crystals, which are required in inertial confinement nuclear fusion [1][2][3][4][5], can be used under a wide transmission band, large nonlinear optical coefficient, and high damage threshold (greater than 15 J/cm 2 , 1 ns). In addition, they can grow large-diameter crystals (Φ500-600 mm) [6][7][8].…”