Thermoplastic forming amorphous alloy microfluidic chip micromold

Based on a designed (Zr _0.6336Cu _0.1452Ni _0.1012Al _0.12) _99.4Y _0.6 amorphous alloy, an amorphous alloy microfluidic chip master mold for imprinting was fabricated by means of a high and low temperature mechanical property tester. Meanwhile, the molding process of the alloy was simulated using Deform software, the filling and rheological processes in the microchannels were investigated. The experimental results show that the filling height of the amorphous alloy is proportional to the temperature and load, but inversely proportional to the strain rate. At a temperature of 703 K, a strain rate of 1 × 10 ⁻³ s ⁻¹, a load of 1500 N, the quality of the imprinted amorphous alloy micromolds is higher. The simulation results show that the flow rate will be higher close to the center of the channel, and the flow rate is smoother near the flow front. The strain rate is lower, the forming is more favorable. In addition, molding quality is affected by temperature and press stroke. At higher temperature and longer stamping stroke, the forming quality is better. When the strain rate is lower, the equivalent strain distribution is more uniform, so that the alloy deformation has better mobility and simple flow behavior, which is more conducive to the formation of polymers. PMMA(Polymethyl Methacrylate) microfluidic chips and ordinary glass(D-FK61) microfluidic chips are prepared by imprinting molding with amorphous alloys. This study shows that amorphous alloys can be used as molding masters for polymers and ordinary glass, thus expanding the application of amorphous alloys in the field of micromolding.