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It is well known that particle velocity before deposition is one of the most important parameters for fabrication of the high-quality cold sprayed coatings. In this work, 316L stainless steel powders were deposited on the substrate with the same material. The influence of particle size, morphology and processing parameters such as gas pressure (up to 4 MPa) and temperature (up to 1000°C), on particle velocity have been investigated using a DPV-2000 inflight particle velocity monitoring system, followed by the measurement and analysis of deposition efficiency and coating mechanical properties including tensile strength and micro-hardness of the coatings. The results show that a higher particle velocity can be achieved by using particles with an angular morphology and a finer particle size. Higher particle velocities, resulting from higher working gas pressure and temperature, yield much denser coatings with higher deposition efficiency, micro-hardness and tensile strength.

The new subproject B8 ''Adhesive processing in batch technology for the manufacturing of microsystems'' has the goal to compile bases for batchable joining techniques based on adhesive systems. This paper presents an alternative adhesive bonding system, which is able to join very small parts as well as relatively big parts with high accuracy requirements. The main advantages are the possibility to apply small volumes, to pre-apply the adhesive with a temporarily delayed joining procedure and extremely short set cycles. Therefore, using hot melts can be a technologically and economically interesting alternative for the assembly and packaging of MEMS.