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    In order to investigate the effect of hot-press fabrication parameters on mechanical properties of Al2O3 ceramic tool materials, the orthogonal experiment method was used. In the experiments, the three influence factors such as the fabrication temperature, pressure and duration time are considered. The experimental results are analyzed by a range analysis of orthogonal experiments. It is shown that the most important factor that affects the mechanical properties is the fabrication temperature and the followed factors are the fabrication pressure and the duration time of fabrication. Scanning electron microscope (SEM) reveals that the hot-press fabrication parameters will significantly affect the microstructure of ceramic tool materials, which can govern the mechanical properties. This has been validated by the orthogonal experiments in the present paper.
    The fabrication is a key process for the preparation of ceramic tool materials, which governs the mechanical properties of ceramic tool materials under the condition of the same compositions. A computer simulation coupled with fabrication temperature for the hot-pressing process of single-phase ceramic tool materials has been developed using a two-dimensional hexagon lattice model mapped from the realistic microstructure without considering the presence of pores. The fabrication of single-phase Al2O3 is simulated. The mean grain size of simulated microstructure by Monte Carlo Potts model integrated with fabrication temperature increases with an increase in fabrication temperature, which is consistent with the experiment results.
    Single phase
    Lattice (music)
    The key principle of the jet deposition rapid prototyping (RP) system is to deliver material through a jet and deposit the liquefied material onto a platform to build a physical model. Model Maker (MM) RP system is one of the jet deposition processes with the smallest slice thickness and better model accuracy. In order to maintain thinner layer thickness and model accuracy, a cutter is employed to plane off the deposited surface. The fabrication speed for MM models is extremely low because of the employment of the tiny jet and the cutting operation. The model interior filling does not affect the model accuracy very much but it does significantly affect the fabrication speed. Hence, a new flexible layer fabrication method is proposed in this paper to separate the fabrication processes of the profile and the interior, respectively, in order to maintain model accuracy and thinner slice thickness, and to accelerate the fabrication speed.
    Rapid Prototyping
    Deposition
    Citations (4)
    Fabrication of micro-scale DEAs could benefit many fields including micro-robots, micro-optical systems besides reducing the driving voltage from kV scale to possibly sub-100V range. In an earlier study, proof of concept fabrication methods for PDMS-based fiber-like micro-sized stacked dielectric elastomer actuators were introduced. This study tried to optimize the fabrication process by investigating the effect of different fabrication approaches and different design geometries on the performance of micro-sized DEAs. Micro-sized DEAs with different geometrical parameters were fabricated. Several fabrication steps were modified and the effectiveness of the new fabrication steps and parameters were investigated.
    Citations (1)
    In this paper, optimization of fabrication process for microneedles has been presented. Using inductively coupled plasma (ICP) etching technology, fabrication of out-of-plane hollow silicon microneedles for blood extraction has been carried out. Sharp tip microneedles with length 1100 µm were designed for fabrication. The fabrication of microneedles was not successful because the lumen section was fabricated first and then hole was created for fluid flow. Previously, using same fabrication method successful fabrication of microneedles was done for drug delivery with length 200 µm. This fabrication method is not suitable for long structure. Thus, the alternative microneedle fabrication steps using ICP etching have been developed and presented in this paper. These steps can be more optimized and suitable for sharp tip, long and hollow structure.
    The US Home Team is responsible for the design and fabrication of the inner module for the ITER Central Solenoid Model Coil, to be installed and tested at JAERI, Japan. The design of the coil has been completed and the fabrication is being carried out. In the first phase, all the tooling for the fabrication have been installed, facilities established, process specification developed and materials procured. The fabrication approach will be confirmed by various trials, and fabrication of two full-size dummy layers. Following this, the fabrication of the 10 layer module occurs between June 1996 and December 1997. The paper describes the tooling and facilities, the process and supporting R&D. Progress in the fabrication is reported.
    Solenoid
    Citations (7)
    The fabrication of the 20 MeV DTL tank1 is finished and the preparation for the vacuum test is proceed. A tank is divided into two sections and 50 DTs will be installed on first tank. We plated copper on inner surface of the carbon steel pipe using the PR plating method. All dimensions were compensated during the fabrication for the tank temperature. In this report, we will discuss the fabrication processes and problems.
    Carbon steel
    Citations (2)
    In order to investigate the effect of hot-press fabrication parameters on mechanical properties of Al2O3/SiC ceramic tool materials,the orthogonal experiment method was used.In the experiments,the three influence factors such as the fabrication temperature,pressure and duration time are considered.The experimental results are analyzed by a range analysis of orthogonal experiments.It is shown that the most important factor that affects the mechanical properties is the fabrication temperature and the followed factors are the fabrication pressure and the duration time of fabrication.Scanning electron microscope(SEM)reveals that the hot-press fabrication parameters will significantly affect the microstructure of ceramic tool materials,which can govern the mechanical properties.This has been validated by the orthogonal experiments in the present paper.
    Citations (0)