National Key Laboratory of Science and Technology on Advanced Composites in Special Environments

Harbin, China

National Key Laboratory of Science and Technology on Advanced Composites in Special Environments

Harbin, China

Time filter

Source Type

Wu Q.,Harbin Institute of Technology | Ma L.,Harbin Institute of Technology | Gao Y.,Harbin Institute of Technology | Xiong J.,Harbin Institute of Technology | Xiong J.,National Key Laboratory of Science and Technology on Advanced Composites in Special Environments
Materials Letters | Year: 2017

Hierarchical truss materials with millimeter-scale struts have been fabricated using a three-dimensional printing and interlocking method. The limitation designs of hierarchical truss materials have been found in this short letter to show the imperfection of hierarchical materials. The analytical models and experimental work have been conducted to investigate the restriction mechanism of the hierarchical design. Polymer hierarchical truss materials with low relative densities (0.66–2.67%) have been fabricated for compressive tests. Euler buckling of hierarchical and first order truss materials has been observed in our experiments. Our conclusions are very useful for accurate comprehension of hierarchical construction and designing ultra-lightweight hierarchical truss materials with high specific strength at low density to avoid the deficiencies of this structural configuration. © 2016 Elsevier B.V.


Huang J.,Harbin Institute of Technology | Song G.,Harbin Institute of Technology | Lv H.,Harbin Institute of Technology | Lei Y.,Harbin Institute of Technology | And 10 more authors.
Thin Solid Films | Year: 2013

Excellent thermal shock resistance is required for thermal protection coatings experiencing high/lowtemperature cycles. In this paper, the pure ceria oxide coatings were deposited by electron beam physical vapor technique at different power densities. The grain orientation, morphology, hardness and thermal cycling oxidation behavior of CeO2 coatings were systematically studied. The deposition power density has remarkable influence on the preferred crystal orientation and morphology of the coatings. The heating-cooling test cycles from 1000 °C to room temperature indicate that the CeO2 coatings with the columnar structure show excellent thermal shock resistance. The hardness of the CeO2 coating varies with thermal cycling. © 2013 Elsevier B.V. All rights reserved.


Zhang Y.-M.,National Key Laboratory of Science and Technology on Advanced Composites in Special Environments | Ke R.,National Key Laboratory of Science and Technology on Advanced Composites in Special Environments | Han J.-C.,National Key Laboratory of Science and Technology on Advanced Composites in Special Environments | Zhou Y.-F.,National Key Laboratory of Science and Technology on Advanced Composites in Special Environments | And 2 more authors.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2013

As a kind of optical window material, sapphire single crystal (α-Al2O3) is irradiated by different kinds of rays and the ion currents when served in the space environment inevitably, therefore, the properties will be decreased. The optical properties and structure changes in sapphire single crystal (α-Al2O3) optical window caused by electron, patron and integrative irradiation were discussed in order to study the properties. The surface roughness, surface accuracy and the transmission before and after the irradiation were characterized. According to the AFM testing results, it could be indicated that surface roughness decreased with the increase of irradiation dose, and the electron and the integrate irradiation has the least and the most effect on the surface roughness and the transmission rate respectively, which indicated that this kind of phenomenon is caused by the surface charging and the internal charging. The result of UV-Vis-VIR and FTIR testing indicated that the transmission rate decreased, especially in ultraviolet band and different particle, caused different effects in different band. There was no obvious effect on surface accuracy through the irradiation.


Sun H.,Harbin Institute of Technology | Liu Y.,Harbin Institute of Technology | Liu Y.,National Key Laboratory of Science and Technology on Advanced Composites in Special Environments | Tan H.,Harbin Institute of Technology | And 3 more authors.
Advanced Materials Research | Year: 2012

In this paper, a various shape-memory materials had been prepared by two-stage curing method. The purpose of using this approach was to maintain the excellent shape memory properties and low glass transition temperature (T g) of shape-memory materials after first stage curing, furthermore, improve the T g and heat resistence effectively after second stage curing. Differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and fold-deploy shape memory tests were used to characterize the feasibility of two-stage curing, thermodynamics properties and shape memory performance of these polymers. DSC results showed that two different curing stages could be achieved successfully, DMA results suggested that heat resistance of materials had been improved after second curing stage, while the fold-deploy shape memory tests proved that the composites possessed excellent shape memory properties, it could be deformed into different shape and recovered its original shape fully within three minutes. © (2012) Trans Tech Publications.


Huang J.,Harbin Institute of Technology | Fan C.,Harbin Institute of Technology | Song G.,Harbin Institute of Technology | Song G.,National Key Laboratory of Science and Technology on Advanced Composites in Special Environments | And 11 more authors.
Applied Surface Science | Year: 2013

Pure CeO2 and La doped CeO2 (LDC) coatings were prepared on nickel-based substrates by electron beam physical vapor deposition at 1173 K. The infrared emissivity in 2.5-25 μm of LDC coatings was enhanced with the increase of La concentration at high temperature 873-1273 K. Compared to the undoped CeO2 coating, the infrared emissivity of 16.7% LDC coating increases by 55%, and reaches up to 0.9 at 873 K. The enhancement of doped coatings' emissivity is attributed to the increasing lattice absorption and free-carrier absorption. The high emissivity LDC coatings show a promising potential in high temperature application. ©2013 Elsevier B.V. All rights reserved.

Loading National Key Laboratory of Science and Technology on Advanced Composites in Special Environments collaborators
Loading National Key Laboratory of Science and Technology on Advanced Composites in Special Environments collaborators