0.6mol% V2O5-doping 0.996(0.95Na0.5K0.5NbO3-0.05LiSbO3)-0.004FeBiO3 ((KNN-LS- BF)-V2O5) piezoelectric ceramics were synthesized by the solid-state reaction process, and the influence of sintering time on structure and properties of (KNN-LS-BF)-V2O5 ceramics were studied. It was found that all the samples...

The corrosion behavior of 2024 alloy in 0.6 mol/L NaCl solution has been studied by EIS, SECM and SEM at the corrosion potential. The EIS results show that the pitting could have occurred between 2 hr and 6 hr immersion and the corrosion dissolution becomes severe with the increase of immersion time....

Recently, researchers focus on how to prepare practical VO2 films with varied colors. Herein, we developed a facile solution process to modify the spectrum of VO2 so that the color of VO2 film could be tuned. The VO2 nanoparticles were functionalized by the 3-aminopropyltrimethoxysilane(APTMS), andthe...

Boronizing of steel surface leads to the formation of two phases (FeB, Fe2B). FeB phase has high brittleness due to its high hardness. Thus, the traditional boronizing cannot be applied for tools and machine parts, working in conditions of dynamic loads, but the new method of electron- beam heating in...

Boronizing is one of the most effective methods of thermochemical treatment of iron-carbon alloys. Boride layers formed with the diffusion can considerably increase abrasion resistance (up to 5-30 times), heat resistance (up to 1.5-2 times) of steels. The aim of this paper is to study structure and wear...

Based on the ANSYS software, a finite element model using for analyzing the properties of the developed cryogenic composite overwrapped pressure vessels (COPV) is established. The stress and strain conditions under the operational pressure were analyzed including of the overwrapped fibrous layer and...

The stress relaxation of the metallic seal is a general problem during its long-term service, which is harmful for the sealing performance. For the metallic seal, the sealing mechanism and the problem of the stress relaxation are analyzed, and the research methods applied to study the problem of stress...

As the key material of gas turbines used in elevated temperature, the mechanism of delamination and failure of thermal barrier coatings (TBCs) under service conditions has been the hot spot of research for a long time.The influence of thermal gradient on thermomechanical fatigue (TMF) behavior of TBCs...

Based on the research of crashworthiness of advanced composites, PAM-Crash simulation software was utilized to predict the crash behavior of thermoset matrix and thermoplastic matrix. The simulation results demonstrated that the thermoset matrix and thermoplastic matrix showed an ideal fragment collapse...

Thermal insulation coating has attracted more and more attention because of the advantages of economic, construction convenient and good heat insulation effect, and it will be expected to promote the development of coatings market and heat insulation materials applications. Based on the above reason,...

The performance variations of pouring organic glass under the different accelerated aging test conditions whose brand is YB- 3 have been studied, which have reached the specified life, the result show that the overall trends the properties of the YB- 3 being used the specified life slightly decrease...

The surface cleanliness grade of some steel structures which are in the harsh environment such as in tidal and splash zone or are hard to construct on site is difficult to meet the requirements of high grade such as cleanliness grade Sa21/2 (ISO 8501). There may be water, rust and original coating on...

For the purpose of solve seawater pipe's anti-corrosion materials problem and it is allÿofÿvarieties, this thesis come up with the copper alloys-nickel composites by Laser direct writing and the method's application and equipment, this thesis also recommend the copper alloys-nickel composites' laser...

In this paper, the preparation technology of super-fine tungsten powder has been studied by using of induction plasma powder synthesis system, and the flow-ability, particle size, the impurity content of the powder before and after plasma treatment have been measured and compared. The result shows that,...

Silica (SiO2) was used to modify the waterborne ultraviolet (UV) curing wood coatings, and the waterborne UV curing wood coating was prepared by optimizing the process parameters. The mechanical properties of the waterborne UV curing wood coating (hardness, adhesion and impact strength) and gloss were...

The talcum powder was employed for the single modification of waterborne ultraviolet (UV) curing wood coatings, through optimizing process parameters to prepare the waterborne UV curing wood coatings. It was found that when talcum powder content in Waterborne UV curing wood coatings was at 2.0%, the...