Advanced Materials Research Vol. 909

Abstract: A high selectivity patterning technology of vanadium oxide (VO_x) thin film was suggested in this paper. VO_x thin film was etched through a photoresist (PR) mask using Cl/N based gases in a reactive ion etching (RIE) system. Taguchi method was used for process design to identify factors that influence the patterning and find optimum process parameters. Experimental results suggested that RF power was the largest contribution factor for VO_x etch rate, PR selectivity and uniformity on 6 inch diameter wafer. Uniformity and PR selectivity were improved by introducing a small amount of N₂. High resolution and low roughness patterning transfer was achieved with a non uniformity of 2.4 %, an VO_x etch rate of 74 nm/min, a PR selectivity of 0.96, a Si₃N₄ selectivity of 5 and a SiO₂ selectivity of 10.

Abstract: In this paper, Tessier sequence extract procedure (SEP), toxicity leaching procedure (TCLP) and simple bioaccessibility extraction test (SBET) were employed to evaluate the immobile efficiencies for As, Cu and Pb contaminated soils. Experimental results indicated that the TCLP was efficient to extract the most active part heavy metal and evaluate the risk of the samples; the Tessier method divided heavy metals in soils to different fractions. Monitoring the changes of different fractions during the immobilizing procedure could help fully understand the mechanism of stabilization. The SBET method simulated the human digest system, thus it could be used to evaluate the risk changes to human during the immobilizing process; and to reveal the potential risk of chemical stability. In our project, these three evaluate method should be utilized properly to help accessing the risk, electing suitable immobilizing method and evaluating the efficiency of stabilization.

Abstract: In this work, the investigations were carried out to study the effect of heat treatment at dual phase of austenite and ferrite on mechanical properties , microstructure and corrosion rate of low alloyed medium carbon steel. The specimens were divided into five groups, first group, specimens were heated to the duel phase region at temperature of 740°C soaked for 30 minutes and quenched in water. The second group, The specimens were heated to 740°C soaked for 30 minutes and quenched in water, then tempered to 480°C soaked for 20 minutes. The third group the specimens were heated to austenizing temperature of 840°C soaked for 30 minutes and quenched in water, then the specimens reheated to the dual phase region at 740°C, soaked for 30 minutes and quenched in water, then the specimens were tempered at temperature 480°C for 30 minutes. The forth group, the specimens were heated to austenizing temperature of 840°C soaked for 30 minutes and quenched in water, this process were repeated again before the specimens were thereafter heated to the dual phase region at temperature of 740°C, soaked for 20 minutes and quenched in water, then the specimens were tempered at temperature 480°C for 20 minutes. The fifth group, the specimens were heated to austenizing temperature of 840°C soaked for 20 minutes and quenched in water, this process were repeated two times again before the specimens were thereafter heated to the dual phase region at temperature of 740°C, soaked for 20 minutes and quenched in water, then the specimens finally tempered at temperature 480°C for 20 minutes. The results proved the hardness increase after heat treatment at first and second group, at third group the highest hardness value was due to formation of martensite and ferrite, but at fourth and fifth groups hardness decreases due to appearance of carbides particles, also corrosion rate usually increases with two phase at microstructure than stable one phase, third group have less corrosion rate than fourth and fifth due to carbides particles formation which lead to more corrosion rate due to three phases presents.

Abstract: Innovation is a crucial issue for organizations to stay competitive especially in the manufacturing sector. As such, knowledge sharing is required to ensure the effectiveness of innovation. Knowledge sharing supports organization in fulfilling customers needs and wants. Besides that, factors that enhance knowledge sharing among employees will bring a lot of benefits to the organization itself such as enabling employees to come out with new idea and be innovative in their organization. In this paper, the authors had identified and discussed several factors that will lead to knowledge sharing intention among employees and its impact on innovation capability. These factors are leadership, trust, reward system and technology.

Abstract: Commonality analysis is the starting point of product family redesign, providing guidance for enterprises to improve commonality, reduce product cost and manufacturing complexity. Firstly, the component-based commonality indices introduced so far are analyzed and the deficiency in respect to commonality evaluation of outsourced function module is indicated. Then, the generalized performance matrix of outsourced function module is established and the commonality index based on generalized Dice coefficient is introduced. Finally, the calculation process is demonstrated by a case study of engine modules. The proposed index is of certain significance to reduce the types of outsourced module instances, save procurement and management cost and reduce the complexity of manufacturing systems.

Abstract: A scroll spring for energy recovery for a washing machine was designed mainly including the spiral spring, ratchet clutch, new gear clutch and other components. The program is that we have stored the mechanical energy with a spiral spring when the washing machine is (anti) to brake and decelerate, and use it while the washing machine is anti-(positive) to start or accelerate. So it achieves the effect of energy saving.

Abstract: Hilbert-Huang transform is a new method of signal processing, which is very suitable for dealing with nonlinear and non-stationary signal. In this article, a gear fault diagnosis method based on Hilbert marginal spectrum is proposed in view of the non-stationary characteristics of gear vibration signal. First the original vibration signal is decomposed into several intrinsic mode functions (IMF) of different characteristic time scale smoothly by means of empirical mode decomposition (EMD) method. Then the Hilbert-Huang transform is carried out for IMF and the Hilbert marginal spectrum under different operating conditions are obtained. Gear faults can be judged through the analysis of the marginal spectrum. The experimental results show that this method can effectively diagnose the gear faults.

Abstract: A proposed design and construction for a new apparatus used in measuring the solid density of masses from 1 kg up to 10 kg in the National Institute for Standards (NIS) at Egypt are presented. The apparatus operates manually and automatically for measuring the density of masses of class E using the hydrostatic weighing principle (Archimedes) according to used international standard. The principle of operation of the Hydrostatic Weighing Apparatus (HWA-NIS) depends mainly on measure the masses of the standard and the under test objects both in air and in liquid. The HWA-NIS measures the solid density with uncertainty of ±0.8 kg.m^-3 at coverage factor k = 2.The HWA-NIS has been used for measuring different nominal masses to validate its performance along the measuring range. The obtained results compared with the standard values. The comparison showed a good agreement between the HWA-NIS outputs and the standard values.

Abstract: A subminiature submersible has been designed on the basis of the condition of the marine ranching, especially the shape of the submersible in view of the complex environment of marine ranching. Its mainly designed from three major movements, namely advance, ups-downs and yawing movement; it can complete three degrees of freedom movement. At the same time a force analysishas beengiven. Thetransfer functions have been deduced, and the simulation structure has been designed according to its kinematics model. According to the simulation results, the feasibility of the kinematics model was verified.

Abstract: Quality is the lifeline of business, and the key point of products quality is the product design quality. In recent years, the quality problems of car products have lingered on, and the large part is brought by the risk of product design quality. Beginning with quality gates, which is a world leading product quality management mode, this article is emphasized on the design quality risk controls principles and methods of car products.