This paper summarizes a theoretical and an experimental approach to employ the Direct Metal Deposition (DMD) process to adjudge the feasibility of depositing overhang features. The DMD process is a process capable of directly manufacturing a fully dense metal part without the use of any intermediate steps. This process, comprised of a laser deposition setup coupled with a 5-axis CNC milling sys...

gd2o3 nanoparticles were prepared by a two–step process; cathodic electrodeposition followed by heat-treatment method. first, gd(oh)3 nanoparticles was galvanostatically deposited from nitrate bath on the steel substrate by pulse current (pc) mode. the deposition experiments was conducted at a typical on-time and off-time (ton=1ms and toff=1ms) for 60 min. the electrodeposited precursor was the...

This paper discusses a method for finding near-optimal build orientations for shape deposition manufacturing (SDM). SDM is a solid freeform fabrication process that allows the creation of complex shaped parts by the iterative application of numerically controlled material deposition and milling operations. The part build time in SDM process depends on the number of layers. And the number of lay...

This paper presents an electrically-mediated process for copper metallization of semiconductor interconnect features. Compared to traditional metallization processes, the proposed electrochemical deposition process uses a singlecomponent bath that contains no difficult-to-control organic accelerators and levelers. The feasibility of the process is demonstrated by copper deposition onto sectione...

Solid Freeform Fabrication (SFF) processes " rapidly " create three dimensional shapes of arbitrary complex geometries by incremental material deposition of 2 1 / 2 dimensional layers. Automated planning and execution of the fabrication process is possible, and the need for part-specific tooling or fixturing is eliminated. However, there are inherent limitations in the resulting surface quality...

This paper gives a brief description of the laser aided manufacturing process. Empirical models describing the process dynamics of the laser aided metal deposition process is developed based on some of the models found in the literature. These models provide the basis for process planning and real time control. An embedded vision system, a two color temperature sensor, and a laser displacement ...

Thin films of SnO2 nanowires were successfully prepared by using chemical vapor deposition (CVD) process on quartz substrates. Afterwards, a thin  layer of palladium (Pd) as a catalyst was coated on top of nanowires. For the deposition of Pd, a simple and low cost technique of spray pyrolysis was employed, which caused an intensive enhancement on the sensing response of fabricated sensors...

An advanced feedback control strategy for a vapor-phase axial deposition (VAD) is investigated in this paper. VAD is a widely used process in the creation of high purity glass for optical fiber. In previous work a soot tip surface temperature controller was developed for the VAD process to reduce the effects of core soot temperature variation on deposition geometry, leading to a more stable pro...