Problem. Electro-spark alloying (ESA) is a promising process of surface modification, which allows obtaining high-quality coating, environmentally safe and energy efficient. Wide application in production hindered by the need to develop technology, as well lack mathematical model for predicting properties coatings depending on materials processing modes. It known that high adhesive bond obtaine...

In this paper, a study was carried out to investigate the surface roughness and material removal rate of low carbon NiTi shape memory alloy (SMA) machined by Wire Electro Spark Erosion (WESE) technique. Experiments are designed considering three parameters viz, spark ON time (SON), OFF (SOFF), voltage (V) at levels each. The increased from 2.1686 μm 2.6869 with an increase in both SON time, SOF...

In the past decade, formulation of spark-desensitized nanothermites has considerably advanced, making them safe to handle. When ignited, these materials reveal impressive properties such as high temperatures (>1000 °C), intense heat releases (>kJ/cm3), and sometimes gas generation. Unfortunately, energetic systems are systematically characterized by an extreme sensitivity electrostatic di...

In this work, two advanced technologies were applied for manufacturing a bimorph wavefront corrector: laser ablation, to vaporize conductive silver coating from piezoceramic surface, and parallel-gap resistance microwelding, provide reliable electrical contact between the piezodisk surface electrodes copper wires. A step-by-step guide mirror production is presented, together with ‘bottlenecks’....