ZrN nano-films were prepared by high power pulsed magnetron sputtering technique (HPPMS) under the different work pressures. SEM and XRD were used to investigate the surface morphologies and the phase structure of the films. The results show that the surface of the prepared ZrN films was smooth and dense, and they have no any macroparticles. The grains of the films grow under the preferred orientations of ZrN (111) and ZrN (220), and show the combined texture with several preferred orientations. The films have very high hardness of 33.1GPa and lower friction coefficient of 0.2. Corrosion resistance has been improved with an increase of the corrosion potential by 0.28V and a decrease of corrosion current by a factor of 5. The samples fabricated at low work pressure possess a better surface properties, but the surface hardness, wear-resistance and corrosion resistance show a decrease at high gas pressure due to more frequent particle collisions.

The impact compression tests for the Mg--3.04Li--0.77Sc alloys under different treatments including solid solution treatment(T4), and solid solution followed by aging treatment(T6), were conducted under high--strain rate using split Hopkinson pressure bar (SHPB). High--strain rate deformation behavior of the heat treated alloys was investigated. Results show that the dynamic deformation behavior of Mg--3.04Li--0.77Sc alloys was noted to appear a negative strain rate effect with increasing strain rate. However, the alloy at T4 treatment improved the maximum strain while that of T6 treatment improved the dynamic yield strength evidently. The alloys after impact deformation show a visible shear localization phenomena under the high--strain rate loading. The thermal softening, and deformation localization induced by the thermal softening as well as the propagation of the micro--cracks along the shear band are responsible for the negative strain rate effect of the alloys under high--strain rate.

The effects of the ratio of the monomer to crosslinker on the process and property of BeO nanopowders were investigated. The results show that the sulfate salt is disintegrated by the auxiliary three-dimensional (3D) tangled network of polymers, so its thermo-decomposing temperature declines obviously. When the ratio of the monomers and cross linker is 6 : 1, the decline degree of the thermo-decomposing temperature is the highest which is around 177^oC; the average particle size of the powders with narrow particles distribution and less aggregation is the smallest which is about 16 nm. When the ratio deviates from 6 : 1, the decline degree of the thermo-decomposing temperature becomes smaller, and the average particle size of the powders increases.

A thermal sensitive polyurethane (TSPU) membrane was prepared by two-step polymerization in solvent and the crystallization of soft segment was analyzed. The results reveal that TSPU shows an obvious phase-separated structure and a phase transition temperature of the soft segment (defined as switch temperature, Ts). The switch temperature (Ts) and the thermal sensitivity of TSPU still remain available after thermal cyclic process. Moreover, when the temperature was lower than the Ts, the crystal of the soft segment was visible, but when the temperature exceeded the phase transition temperature of soft segment, the crystal of the soft segment melted and disappeared. As a result, the average radius (R) of the free volume holes and water vapor permeability of TSPU membrane showed a response to thermal stimuli. The phase transition of the soft segment controlled the significant change in free volume hole size and WVP, and the process mentioned above was stimulated by the external temperature.

The isothermal oxidation behavior of NiAl–28Cr–5.94Mo–0.05Hf–0.01Ho directional eutectic alloy in the temperature range of 900–1150  was investigated. The results revealed that a continuous Al2O3 scale was formed and owned excellent oxidation resistance. Trace rare earth element Ho distributed uniformly at the alloy, together with refining structure and relatively high content of Al of Cr(Mo) phase by directional solidification (DS) process are beneficial to the formation of continuous Al2O3 coatings. During the oxidation of NiAl–28Cr–5.94Mo–0.05Hf–0.01Ho directional eutectic alloy, a phase transformation from θ–Al2O3 to α–Al2O3 was found on the surface of oxidation film, and it resulted in the abnormal oxidation mass gaining when the alloy oxided at 1000^oC.

Metallurgical grade silicon was purified by electron beam melting (EBM) method. The distribution of aluminum in the ingot was found that aluminum was dragged from the bottom to the top and from the edge to the center of the ingot. The aluminum content in the edge was the lowest, even lower than the detection limit (1×10−5%) of ICP–AES. The evaporation of aluminum during EBM process was studied both theoretically and experimentally. The relationship between the removal efficiency for aluminum and the surface temperature of the melting silicon and melting time was deduced from Langmuir’s equation and Henry law. It showed that the removal efficiency of impurity aluminum increased with the increase of the melting time and the surface temperature of the melting silicon. Good agreement was found between the calculated value and the measured value.

The influence of SrCO3 on the microstructure of AZ31 magnesium alloy has been investigated. The results show that AZ31 magnesium alloy has the best refining effect when the AZ31 magnesium alloy with addition of 0.6% SrCO3 in 760, the average grain size of the α–Mg grain decreases from about 570±15 μm of AZ31 base alloy to 110±10 μm, the reduced extent is about 80.7%.Based on the analysis of EDS, Ebind and Gibbs free energy, the mechanism of grain refiner was generation of Al4C3 that can be used as crystallization center of the Mg when SrCO3 added. Due to the generation of Al4C3 in AZ31 magnesium alloy, the grain boundary is pined and the grain growth is limited. The Al element was quickly pushed to the grain boundary along with the solid/quid intergace,and generated the β– Mg17Al12 phase along the grain boundary which has an effect of immobilizing the grain boundaries.

The low infrared emissivity coatings were prepared by using epoxy modified silicone (EA) and Al powder (mass ratio 3:2) as organic adhesive and pigment respectively. The influence of the curing temperature on anti-corrosion properties of the coatings was researched. The chemical composition and the surface structure of EA/40% Al coating were characterized, and the corrosion behavior was investigated by the electrochemical method and anti-corrosion tests. The results show that the coatings curied at 200^oCexhibit the excellent salt spray resistance, anti ultraviolet ageing performance and hot-wet resistance, which can reach the requirements of engineering applications.

Mesoporous titania was preparated by alcohol-heating method using cetyltrimethyl ammonium bromide(CTAB) as a template,tetra-n-butyl titanate(TBOT) as titanium source and anhydrous ethanol as a solvent. The products were characterized by N2 adsorption-desorption, XRD and TEM . The catalytic activity of mesoporous titania was investigated by the photocatalytic degradation of methylene blue and compared with Degussa P–25. The results show that the anatase TiO2 powder with the specific surface area of 248.8 m2/g, and a pore radius of 4.92 nm, has better photocatalytic activity.

Polycrystalline skutterudites Ba0.32Co4Sb12−xTex (nominally x from 0.1 to 0.9) were successfully synthesized by high pressure and high temperature (HPHT) method. The XRD results indicate that all samples have the crystal structure of single phase CoSb3. The dependence of electric transport properties for Ba0.32Co4Sb12−xTex samples on Te filling fraction and pressure has been investigated at room temperature. All samples show n-type conduction.The absolute value of Seebeck coefficient and the electrical resistivity decrease with the increasing of Te content. The maximum power factor (9.7 μWcm−1K−2)is obtained for Ba0.32Co4Sb11.9Te0.1 synthesized at 1.5 GPa and 900 K.

A novel multiple emulsion–solvent evaporation method was successfully adopted to prepare polyfunctional aziridine/polyester cross linking microcapsules, during which various synthesis process parameters were discussed in detail. It was found that too fast a solvent evaporation rate would result in shrink porous microcapsules, and even hardening rate for microcapsule shell could be achieved with solvent evaporating in ca. 2 hours. Polyester with lower surface free energy was found to be beneficial for capsulation, and fully capsulated microcapsules were synthesized at 34.5 mJ/m2. Adding 2.5% of colloid stabiliser could result in even–structured microcapsules with hollow structure. Well–defined microcapsules with even shell thickness were obtained at 50%:50% of shell/ core mass ratio, with a core content of 22%, indicating that morphology and core content of microcapsule strongly depend on shell/ core mass ratio. SEM and FTIR were used to determine morphology and chemical constitution of microcapsules. Hollow–structured microcapsules with even shell thickness could be clearly observed. XAMA–7 core were well capsulated at the centre of microcapsules.

PEEK matrix composites filled with short carbon fibers (CF) and ZrO2 particles were compounded using a twin-screw extruder followed by injection molding. The tribological properties of the PEEK/CF/ZrO2 composites under the water lubrication were systematically studied. It was revealed that the hybrid composites exhibit excellent wear-resistance in the water conditions. The friction coefficients of the composites slightly changed with increasing of the applied load, while the wear rates of the hybrid composites decreased with increasing applied load. Main wear mechanism of the composites in water was mild abrasive wear and fatigue wear. The high wear resistance of the composites should be attributed to the existence of the carbon fibers: the carbon fibers carried the main load between the contact surfaces and protected the soft polymer matrix from further severe impact and abrasion of the counterpart. The incorporation of the ZrO2 particles could effectively inhibit the carbon fiber failure and debonding, which resulted in a better wear resistance property of the hybrid PEEK composites compared with sole CF reinforced PEEK composites. However, high loading of the particles would also aggravate the fatigue wear of the composites and lead to a deterioration of the wear resistance of the composites.

N–doped mesoporous TiO2 was prepared via a facile sol–gel route catalyzed by citric acid, and N–TiO2 was characterized using powder X–ray diffraction (XRD), High–resolution transmission electron microscope (HRTEM), X–ray photoelectron spectrum (XPS), N2 adsorption (BET), UV–xis diffused reflectance spectra (UV–vis). The results revealed that uncalcined N–TiO2 was amorphous, and the products calcined under lower temperatures were anatase, while the one annealed at 750^oC was rutile .The doping of a little N  element resulted in a red shift of the absorption edge, shifting to the visible light region of mesoporous TiO2. N2 adsorption isotherm showed that the BET surface area and the average pore size of N–doped TiO2 were about 102 m²/g and 9.8 nm, respectively. Compared with P25 TiO2, N–doped mesoporous TiO2 exhibited improved photocatalysis activities for photodegradation of methyl orange.

The EM performance of M–type Ba–ferrite is improved through the doping of Co–Ti, and the ideal doping amount is determined. The initial permeability of the material is increased from 1.5 to 15, Hc achieve minimum and the dielectric constant decrease with raise of the frequency when substitute amount of M–type Ba–ferrite is 1 at M–type Ba–ferrite doping Co–Ti.It can be used to fabricate the high frequency chip inductor. Introduction of Co–Ti is beneficial reducing the sintering temperature for the product . The sintering temperature of the material can be decreased to about 1000^oC.

FHA (Ca10(PO4)6(OH)F) powder of F doping Ca10(PO4)6OH)2 (HA) was synthesized by the precipitation method, and the FHA coating was prepared on the surface of the titanium alloy (Ti6Al4V) by electrophoretic deposition. XRD, SEM and EDS were used to investigate the influences of the substrate pretreatments on the coating morphology and binding force of the coatings, and the bioactivity of the coatings was also investigated. The results show that there are microcracks on the surface of the coatings pretreated by acid treatment, however, the microcracks are not found on the surface of the coatings treated by alkali treatment after acid treatment, having higher adhesion than those coatings pretreated by acid treatment. Bone-like calcium deficiency apatite, which grown like petal, with several hundred nanometers in length, formed on the surface of FHA coating after soaking, showing an excellent biological activity.

The stress rupture properties of GH706 superalloy at diffierent heat treatments are studied in precent work. For two-step treated GH706 alloy, cellular $ particles precipitate closely at the grain boundaries, strengthening grain boundaries, leading to the prolongation of the stress rupture life. In three-step alloy treated, the needle-like η phases are formed at the grain boundaries, which enlarge the area of the depleted zone of the γ' and γ'' strengthening phases. This zone characterizes with poor strength, which deteriorates grain boundaries. Cracks are prone to initate at γ' and γ'' depleted zone, then the cracks are easily to propagate. Consequently, the stress rupture life is reduced. For direct aging (DA) treated alloy, the rod-like η particles precipitate loosely at the grain boundaries, which makes grain boundary strengthening. The free precipitated phase zone is formed between η particles, which can passivates crack initiation and propagation. This may lead to the longest stress rupture life and the best rupture elongation of the DA GH706 alloy among three kind heat-treated alloys.

The Fe-Ni-S amorphous alloy film was electro-desposited from an acidic bath containing boric acid as a buffer agent, sodium citrate as a complexing agent and saccharin and 2-butyne-1,4-diol as the additives. The crystallization behavior and surface micromorphlogy of the alloy were studied by differential scanning calorimetry (DSC), X-ray diffractometry (XRD) and scanning electron microscope (SEM). The structure of the as-plated coating is amorphous. The amorphous alloy coating was converted into Fe7Ni3 (Im3m) microcrystalline at 250℃.The alloy was initially crystalled to NiS (R3m) and FeNi3 (Pm3m) at 320.4℃, and was mainly crystalled at 417.9℃, then, was completely crystalled to large number of diameter 100～200 nm grains at 500℃. The effect of heat treatment temperature on the magnetic properties, the micro-hardness and the corrosion resistance of the coating were investigated. As a result, the magnetic properties, micro-hardness and corrosion resistance of the coating rose with the increase of the heat treatment temperature bellow 250℃, then, they all decreased with the increase of the heat treatment temperature above 250℃. The maximum of the saturation magnetization, micro-hardness and electrochemical impedance (MS≈1201.1 kA/m, HV≈425.4 kg/mm2, Z′≈400 Ω) and the minimum of the coercivity (HC ≈2.1 kA/m) appeared at 250℃. Thus, the alloy coating heated at 250℃ possesses best soft magnetic performance and corrosion resistance.

The surface of low density polyethylene film was modified using low temperature O2 plasma under the condition of working pressure of 20 Pa and treatment power of 30 W. The results were analyzed with water contact angle measurement, Fourier transformed infrared spectroscopy(FTIR), differential scanning calorimetry(DSC), scanned electron microscopy(SEM), atomic force microscopy(AFM), etc.. The results showed that the weight loss rate of per unit area was improved as linearity with the increase of the treatment time of 10 s∼300 s; the water contact angle was gradually decreased in the 0∼20 s and theirs values did not change obviously during the 40 s∼300 s treatment time; the evolution of water contact angle was gradually increased with the aging time; the surface of low density polyethylene could form some polar species such as carbonyl, hydroxyl and carboxyl groups and the thermal behaviors (mainly crystallinity) were changed after treatment by low temperature O2 plasma.

Influences of the Mg interlayer film on microstructures, kinetic clotting time and interface bonding force of TiO2 film deposited on nano-grained Ti (NG-Ti) by DC magnetron sputtering technology were researched. The results show that Mg interlayer film has significant influences on the microstructures, kinetic clotting time and interface bonding force of TiO2 film. Mg interlayer film makes the structure of TiO2 film on NG-Ti transform from rutile phase containing a few anatases to MgTiO3,Ti2O3 and a few rutile phases. It makes TiO2 film grow into the micro-scale clusters with the nano-scale domains along the grain boundaries of the Mg film. These lead to the increases of the clotting time of TiO2 film from 17min to 40min and of the interface bonding force from 17N to 36N also.