Time filter

Source Type

Dalian, China

Dalian Jiaotong University is a university in Dalian, Liaoning, China under the provincial government. It has its larger campus near downtown Dalian and smaller campus in the High-Tech zone in Lüshun. Until 2004, it was known as Dalian Railway Institute . Wikipedia.

Wang Y.,Dalian Jiaotong University
High Performance Polymers | Year: 2015

Two novel thermally stable high-performance polymers, poly(arylene ether pyrimidine)s have been prepared with 2,4-dichloropyrimidine and 4,4-(hexafluoroisopropylidene)diphenol and bisphenol A by nucleophilic displacement reaction, respectively. Gel permeation chromatography results show that the obtained polymers exhibited 20,000 g mol-1 weight-average molecular weight. Thermal analysis studies indicate glass transition temperature values up to 156°C in differential scanning calorimetry and thermogravimetric analysis results revealed outstanding thermal stability up to 430 and 427°C for 5% weight loss under nitrogen and in air atmospheres, respectively. The polymers are soluble in a wide range of organic solvents, such as tetrahydrofuran, chloroform, N-methyl-2-pyrrolidone, N,N-dimethylacetamide, N,N-dimethylformamide, dimethyl sulfoxide, and toluene at room temperature. The cutoff wavelengths of the resulting polymers were in the range of 278-283 nm. © 2014 The Author(s). Source

Wang H.T.,Dalian Jiaotong University | Wang L.C.,Dalian University of Technology
Construction and Building Materials | Year: 2013

Since high strength of lightweight aggregate concrete leads to increased brittleness, fiber reinforcement should be considered for improving strength and ductility. Five groups of SFLWC specimens with different steel fiber volumes including 0.0%, 0.5%, 1.0%, 1.5% and 2.0% were tested to investigate the effect of steel fiber content on the static mechanical properties and the impact resistance of lightweight aggregate concrete. The static mechanical properties include the prismatic compressive strength, splitting tensile strength, first-crack flexural strength, flexural strength, and flexural toughness, etc. The impact resistance of SFLWC was obtained by a series of drop-weight tests, recommended by the ACI committee 544. The experimental results indicated that addition of steel fiber can greatly improve such mechanical properties as the splitting tensile strength, flexural strength, flexural toughness and impact resistance, but leads to a little effect on compressive strength. The test results also showed that a logarithmic relation exists between flexural toughness energy by means of the generated load-deflection curves from the flexural tests and the impact energy by means of drop-weight tests. Further more, the author suggests the feasible volume ratio of this kind of steel fiber is 1-1.5%. © 2012 Elsevier Ltd. All rights reserved. Source

Liang B.,Dalian Jiaotong University
Nonlinear Analysis: Real World Applications | Year: 2011

This paper is devoted to studying a fourth-order parabolic equation ut+ε( uxxx)x-δ uxx=0 with Dirichlet boundary. By transforming the fourth order problem into an elliptic-parabolic system and applying a semidiscretization method, the existence, uniqueness and regularization of solutions are obtained. By introducing an energy functional through the semi-discrete problem, we use the iteration method to show that the solutions of the developing equation exponentially converge to a constant steady state solution as the time variable t→∞. Finally, we get the result of the asymptotic limit δ→0. © 2010 Elsevier Ltd. All rights reserved. Source

Tian R.,Dalian Jiaotong University | Sun J.,Dalian Maritime University
International Journal of Hydrogen Energy | Year: 2011

TiN coating is successfully deposited on 316L by multi-arc ion plating. Corrosion behavior of TiN coated 316L is studied in 0.05 M H2SO 4 + 2 ppm F- simulating proton exchange membrane fuel cell (PEMFC) environments using electrochemical method, and interfacial contact resistance (ICR) is measured before and after potentiostatic polarization at operation potential for PEMFC. The TiN coated 316L exhibits promising ICR and improved corrosion resistance in simulated aggressive PEMFC environments. Only general overall corrosion is observed after potentiostatic polarization. Stable passive film has formed on the surface of the TiN coated 316L after potentiostatic polarization at the operation potential and results in a slight increase in the ICR. These results indicate that the TiN coated 316L is a candidate bipolar plate material for PEMFC stacks. Copyright © 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. Source

Tian R.,Dalian Jiaotong University
Journal of Power Sources | Year: 2011

Chromium nitride/Cr coating has been deposited on surface of 316L stainless steel to improve conductivity and corrosion resistance by physical vapor deposition (PVD) technology. Electrochemical behaviors of the chromium nitride/Cr coated 316L stainless steel are investigated in 0.05 M H 2SO4 + 2 ppm F- simulating proton exchange membrane fuel cell (PEMFC) environments, and interfacial contact resistance (ICR) are measured before and after potentiostatic polarization at anodic and cathodic operation potentials for PEMFC. The chromium nitride/Cr coated 316L stainless steel exhibits improved corrosion resistance and better stability of passive film either in the simulated anodic or cathodic environment. In comparison to 316L stainless steel with air-formed oxide film, the ICR between the chromium nitride/Cr coated 316L stainless steel and carbon paper is about 30 mΩ cm2 that is about one-third of bare 316L stainless steel at the compaction force of 150 N cm-2. Even stable passive films are formed in the simulated PEMFC environments after potentiostatic polarization, the ICR of the chromium nitride/Cr coated 316L stainless steel increases slightly in the range of measured compaction force. The excellent performance of the chromium nitride/Cr coated 316L stainless steel is attributed to inherent characters. The chromium nitride/Cr coated 316L stainless steel is a promising material using as bipolar plate for PEMFC. © 2010 Elsevier B.V. All rights reserved. Source

Discover hidden collaborations