Advanced Materials Research Vols. 706-708

Abstract: This paper chose LiMn2O4 as ion-sieve. In the ion-sieve precursor pickling experiment, the elution effects of hydrochloride, nitric acid and sulfate were compared and hydrochloride was proved the suitable eluent. By changing the acidity of pickling time, the lithium evacuation rate and the manganese solution loss rate basically achieved balance after pickling for 5 h. The static adsorption experiment suggested that when the pH was 12.5 and adsorption time was 30 h, the equilibrium adsorption capacity was 19.71 mg/g.

Abstract: According to the particularity of aluminium alloy thin-walled bowl, the programming strategies for high-speed milling process were analyzed, including the tool path strategies, leading in/out, and the tool path connections. A programming example was used to illustrate the practical application of Powermill software in high-speed milling of aluminium alloy thin-walled bowl.

Abstract: The formation and characteristics of atomic defects in Fe-Al alloys and their influences on order-disorder and vacancy-hardening are investigated and discussed in this paper.

Abstract: According to the problem of core-pulling in the injection mold design of side holes plastic parts, analyzed the structural features and forming process of side holes plastics. Introduced the injection mold structure of side holes plastics, the design essentials and working process of the injection mold, then reasonable mold structure and side core-pulling mechanism ware designed. The design of inclined guide pillar core-pulling and combined core mechanism reduced the die cost and made the manufacture convenient.

Abstract: For the friction stir welding technology of the low carbon steel, according to the character of the friction stir welding process, the researchers build a simplified heat input numerical model, and use the finite element analysis software ANSYS to simulate the transient temperature field distribution and the feature points of thermal cycle curve of the 4 mm Q235A steel in the butt joint. Comparing the simulation results and the feature point temperature curve measured by the thermocouple, the researchers verify the heat input model and simulation method is correct. It provides the scientific basis to select the right experimental parameters.

Abstract: The paper reports the tribological properties of the CrAlN coating tools at different speeds and loads. The coating was deposited on cemented carbide by cathodic arc physical vapour deposition technique. Ball-on-disc wear tests were performed on the CETR UMT-2 test system against SiC balls. The coating character and test results were obtained through SEM, XRD and Wyko surface profilometer. The results are as follows: The value of friction of coefficients decreased and depth of wear tracks became sallower as speeds increased and the coating presented adhesion phenomenon under low load. CrAlN coating showed excellent anti-wear properties at high speed and low load, and was more suitable for these similar working conditions.

Abstract: The structure, carrier concentration and low temperature magnetoresistance of Tantalum-doped Tin oxide thin films prepared by RF magnetron sputtering method have been investigated. Hall coefficient is negative at all measuring temperatures, which confirms the n-type characteristic of the films with metallic characteristic. The low temperature magnetoresistance measurement show negative magnetoresistance at all measured temperatures from 2 to 30 K. However, weak-localization theories can not explain the behavior of the negative magnetoresistance of our samples. We fitted the magnetoresistance data of the samples with semiempirical expression that takes into account the third order sd exchange Hamiltonians. The theory and experiment are in excellent agreement. This strongly suggests that the magnetoresistance in SnO₂: Ta film originates from the scattering of conduction electrons due to localized magnetic moments.

Abstract: Under the guidance of ecological civilization, the research field of clothing materials has also started to advocate “ecological clothing materials” and promote “environmental protection”. The most fundamental solution for clothing textiles to satisfy the requirements of environmental protection is to choose environmental materials. New ecological clothing materials developed in these years cover continuous development and innovation of natural materials and regenerated fiber materials which have been substantially used in modern clothing design and promoted the development of modern clothing design toward the new concept of environmental protection. Property advantages of ecological and regenerated fiber materials will be introduced in this paper and its development and application in clothing design will be further illustrated.

Abstract: A newly devised process using micro-electrochemical machining (MECE) is described as a recycling module in the current study. The purpose is the precise removal of In2O3SnO2 thin-film nanostructures from optical PET diaphragm surfaces for digital-paper surface. In the current experiment it was found that a large rotational diameter (Dc) for the cathode with a small gap width between the anode and the PET diaphragm surfaces was found to remove the In2O3SnO2 rapidly. A small edge radius of the cathode, or a short arc length of the anode, reduces the time taken for In2O3SnO2 removal. A high feed rate of the PET and adequate electrical power results in fast machining. Pulsed direct current improves dregs discharge and this is an advantage with a fast feed. A high electrode rotational speed also corresponds to faster removal of the In2O3SnO2 nanostructures. The development of the proposed precision production design is based on both technical and economic considerations.

Abstract: Three-dimensional (3D) Voronoi tessellation diagrams are generated by compiling program in MATLAB software. According to these 3D Voronoi cells, crystal structure, even the disorder structure, can be geometrically described and tessellated into the regular object, reflecting the atomic structural parameters, such as the coordination numbers (CN) and the atomic separation. Studying the characteristic of these tessellations, we can find the rule of atomic packing in real space. This Voronoi diagram is also useful in materials structure teaching curriculum and it is the significant basis to realized the atomic structure of the materials. By programing with MATLAB, the abstract concept of Voronoi tessellation are transformed into the lively and understandable computer animation, which can be easily recognized and mastered.