Carbon fiber reinforced plastic (CFRP) was fabricated by alternately laying epoxy resin films and carbon fiber fabrics for a desired number of layers. The prepared CFRP could be in different status such as dry, soft, wet and solid corresponding to ambient temperature, and temperatures of glass transition and melting and curing of resin films, respectively. Blanking tests were performed by means of a home made shearing blanking die to characterize the vertical shearing fracture for the prepared CFRP of different status. Results show that the vertical shearing fracture of the dry/solid, soft and wet CFRPs present characteristics of typical nonlinear deformation, discontinuous and delaminating fracture, and the required blanking forces increase in turn. Moreover, blanking with a small gap, proper angle and high speed may be helpful to relieve the discontinuous fracture of partial carbon fiber yarns and promote the delaminating fracture of CFRPs to be much concentrated and stability.

The hot deformation behavior of as spray-formed Nb-containing AISI M3: 2 high speed steel has been investigated by compression tests at a temperature range of 950-1150℃ and a strain range of 0.001-10 s^-1 with 50% reduction. Processing maps were developed according to the principles of Dynamic Material Model. It was found that the flow curves assumed the classic shape of dynamic recrystallization (DRX)-rising to a peak, following a softening to a steady state. The hot working process of the steel can be carried out safely in the domain of (T_d: 1050-1150℃, : 0.01-0.1 s^-1). To obtain microstructures of the steel with fine grains and uniform distribution of fine granular carbides, the hot working process should be carried out at 1150℃ and strain rate of 0.1 s^-1. The flow instability took place when strain rates exceed 1 s^-1. After a proper hot working and heat treatment, the hardness and bending strength of the spray-formed Nb-containing M3:2 high speed steel is 67 HRC and 3467 MPa, respectively.

Poly(methyl methacrylate) (PMMA) spheres were firstly prepared through dispersion polymerization, then with which as sacrifice template, PMMA/Y(OH)CO₃ composite microspheres were prepared by homogeneous precipitation technique. Thirdly, Y₂O₃ hollow spheres were obtained by calcination of PMMA/Y(OH)CO₃ at elevated temperature, and finally Y₂O₃ hollow shperes reinforced butyl rubber composites were fabricated. The structure and morphology of the Y₂O₃ hollow nanospheres were characterized by means of Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectrum (XPS), X-ray diffraction (XRD) and thermogravimetry (TG). The results show that hollow spheres composed of Y₂O₃ particles of face-centered cubic crystallorgraphic structure, and their diameter is about 1 μm with a thin shell thickness about 80 nm. The hollow microspheres and powders of Y₂O₃ as filler were added respectively into butyl rubber to prepare butyl rubber composites. It follows that the butyl rubber composites with addition of Y₂O₃ hollow spheres rather than that of Y₂O₃ powders exhibited better damping properties with larger loss factors by frequencies such as 8, 18, 28, 50, 65 and 90 Hz.

Cold-draw molybdenum wires with diameters of 125, 140 and 160 mm were selected as a model material. Tensile tests and tension-tension fatigue tests under stress control were conducted to investigate mechanical performance of the micron-sized Mo wires. While the fractured surfaces of the wires were examined by scanning electron microscopy. The experimental results show that both of tensile and fatigue strengths under stress control decrease with the decreasing wire diameter. The size effect on fatigue performance of the Mo wire can be attributed to the difference of the quantity of grains along the radial direction, which leads to that the smaller the wire diameter the more sensitive to the fatigue crack or defect on the Mo wire surface, and thereby, the shorter the fatigue life.

Nanocomposite hydrogels of sodium alginate (SA) / polyacrylamide (PAM)/ graphene oxide (GO) were prepared by in situ polymerization.The structure and properties of hydrogels were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscope (AFM), Fourier transform infrared spectroscopy(FTIR) and thermogravimetric analysis (TG). The effect of GO content on the chemical structure, mechanical and swelling properties of the hydrogels was investigated. The results show that the well exfoliated GO flakes could be uniformly dispersed in the polymer matrix, therewith the intermolecular interactions between the components might be enhanced and parts of PAM macromolecules chains were probably grafted onto the GO nanosheets, which in turn changed the microstructure of the hydrogels and resulted in significant enhancement of mechanical properties of the composite hydrogels. As a result, in comparison with the two hydrogeles of pure SA and pure PAM, the prepared composite hydrogels exhibited both of higher tensile strength and breaking elongation up to 200%, as well as a higher compressive strength up to 156%. The swelling capacity of the composite hydrogels increased and then declined with the increasing GO content, while increased with the increasing SA content.

A superhydrophobic ZnAl coating was prepared by the electric arc spraying technology and then surface modification by stearic acid/ethanol. The surface wettability, morphology and chemical structure of the ZnAl coating before and after modification were characterized by contact angle measurement (OCA-20), scanning electron microscope (SEM) and artificial FTIR spectrometer (ATR), respectively. The impedance spectrum and polarization curves of the coatings were measuared by electrochemical workstation (Solartron Analytical) with three electrodes system. The results show that the as sprayed ZnAl coating consists of irregular micro- and nano-sized alloy particles and pores, and exhibits clear hydrophilicity, which may be ascribed to the high surface energy of metallic coating. After the surface modification with stearic acid, the static contact angle of the coating reached 153.8° with a rolling angle less than 10°, because there exsited a large number of hydrophobic long alkyl chains on the surface of the modified ZnAl coating. In addition, the surface modification could significantly enhance the corrosion resistance of ZnAl coating due to that the thin hydrophobic film plays an important role in supression of the fall off and dissolution of corrosion products on the ZnAl coating, leading to the increase of charge transfer resistance and the corrosion current density.

ZnO nanorods arrays were synthesized by hydrothermal method from an aqueous solution of Zn(CH₃COO)₂ and C₆H₁₂N₄ with additives of NH₄NO₃ and Al(NO₃)₃. The results show that the use of NH₄NO₃ in the solution leads to a decrease in nonradiative recombination centers in the ZnO nanorods by lowering their defect density. The reduction of the nonradiative recombination in ZnO nanorods results in a descent in the Stokes shift of the nanorods by 49%. In addition, the optical band gap of the ZnO nanorods could be adjusted in a range of 3.36-3.57 eV by controlling the additives concentration in the solution. The increase of the carrier concentration as a result of the Al doping leads to a blue shift of the optical band gap of the ZnO nanorods to 3.56-3.57 eV, which can be ascribed to the Burstein-Moss effect.

The influence of alloying elements on mechanical property and fracture toughness of A7N01S-T5 aluminum alloy was investigated on the basis of impact test, tensile test and three point bending test. The results show that with a proper addition of the selected alloying elements such as Zn(4.34), Mg(1.43), Mn(0.27), Cr(0.13), Zr(0.12) and Ti(0.066), the A7N01S-T5 aluminum alloy possesses a comprehensive performance with tensile strength 415 MPa, yield strength 378 MPa, specific elongation 13.49%, impact energy 12.3 J and fracture toughness 28.950 kJm^-2 respectively. It is noted that among others the content of Zn and Mg is the main factor influencing both the strength and ductility, therefore, which should be carefully chosen. It is observed that η′ phase precipitates in the grain interior and η phase precipitates discontinuously at grain boundaries for the A7N01S-T5 aluminum alloy with proper chemical composition.

Submicron spherical CoAl₂O₄ pigments were hydrothermal synthesized using CoCl₂·6H₂O and AlCl₃ as raw materials, NaOH as the precipitant and diethanolamine (DEA) as capping agent, respectively. The effect of the concentration of raw materials, the ratio of n_Co/n_Al and the amount of DEA on the phase composition, particle size and morphology as well as the chroma of the as-prepared pigments was investigated by means of XRD, TEM and calorimetric analysis. The results show that submicron spherical CoAl₂O₄ pigments with size in a range of 100-230 nm could be synthesized under the conditions of n_Co/n_Al=1: 2, Co²⁺ concentration 0.05 mol/L and DEA 12%(V/V). The formation of spherical particles was analyzed from the point of view of kinetically controlled crystal growth in the presence of DEA. It follows that during the nucleation and growth process of the crystalline particles, DEA molecules can be adsorbed onto the edges and vertices of the particles in a highly oriented manner thus causing steric hindrance, which enable the spherical growth of the crystalline particles to be possible.

The influence of addition of alloying elements of medium carbon Fe-Mn and Ni in the welding flux on the microstructure and toughness of the weld seam of FV520(B) steel was investigated by means of impact test, metallographic microscope, SEM and X-ray diffractometer. The results show that the microstructure of the weld seam of FV520(B) steel mainly composed of tempered sorbite and lath martensite with some residual austenite and secondary phases. With the increasing amount of alloying elements Mn and Ni, the microstructure of weld seam became finer, and the lamellae of martensite became thinner and distributed more uniformly. The addition of allying elements into a basic flux rather than an acidic ones showed much higher effectiveness in improvement of the toughness of the weld seam. The induced Mn and Ni can enhance the austenitic amount in the weld seam, which in turn plays an important role in enhancing its toughness. Moreover, the induced Ni rather than Mn was more effective in enhancing the toughness of the weld seam.

Evolution of drawing texture for A6 aluminum conductor with the drawing process was investigated by macro and micro-texture analysis. The results show that the fiber-like deformation texture of <111> and <100> formed in the drawing process, and <100> texture reduced while <111> texture enhanced with the increasing strain. The distribution of deformed texture was of homogeneity along the radial direction of wire: the deform texture transformed from strong <100> texture (~52% volume fraction) in the surface to strong <111> texture (~55%) in the center by moderate strains; the radial gradient texture was weakened and a strong <111> texture (>70%) formed in the overall wire by high strains. Moreover, the core hardness of the wire was higher than that of the surface, which attributed to the texture gradient distribution along the radial. Adjusting the drawing process to optimize the dislocation density and texture as well as their distribution in the wire is an effective route to improve the strength and conductive properties of the A6 aluminum conductor.