Search

Your search keyword '"Peng Jin"' showing total 101 results
Start Over Author "Peng Jin" Journal advanced materials research
101 results on '"Peng Jin"'

1. Effect of Reinforcement Addition on Microstructure and Mechanical Properties of Al Matrix Composites

Author

Pei Peng Jin, Yu Tian Ding, and Guo Jun Ma

Subjects
Materials science, Whisker, Whiskers, Composite number, General Engineering, Fracture (geology), Nucleation, Composite material, Microstructure, Material properties, Reinforcement
Abstract

The study investigates the influence of different fraction of Mg2B2O5 whiskers (5, 10, 15 and 20vol.% ) on the microstructure of the hot extruded composite as well as on the mechanical properties in the same condition. The results indicate that the process is available for producing the composite, image analysis shows the whisker tends to cluster together with increasing content of reinforcement. When the content of the reinforcement is 10%, the composites exhibit the best mechanical properties, meanwhile, it demonstrate cluster is unfavorable to the improvement of properties of materials. The ductile failure of 6061Al matrix, the reinforcement fracture and the whisker-matrix interface debonding acted as the main mechanism of fracture nucleation.

Published
2014

2. Void Formation and Growth at Solder-Bonded Interfaces in HP LEDs

Author

Wei Liu and Peng Jin

Subjects
Void (astronomy), Materials science, Thermal resistance, General Engineering, Thermal management of high-power LEDs, law.invention, Heat flux, law, Soldering, Miniaturization, Electronic engineering, Junction temperature, Composite material, Light-emitting diode
Abstract

Heat flux inside the HP LED chip is also increasing with the increasing drive current, integration and miniaturization of LED chips. The junction temperature of LED strongly depended on the heat transmission capacity of die attach layer, which provided the heat dissipation channel between the heat generating LED chips and the heat slug. The voids, interrmetallic compounds or a small delamination would lead to the increasing thermal resistance in the die attach layer. In this paper, the reliability of soldered-bonded interfaces was studied in high-brightness LEDs, which were prepared by Cree and currently available on the market. Results revealed that the higher drive currents would lead to the accelerated degradation or failure of treated LEDs. Additionally, the injection current had an important effect on void formation and growth at the solder-bonded interfaces. The larger drive current would induce the delamination between LED die and heat slug. This study provided some guidance for the end users and a theoretical basis for solder-bonded technologies.

Published
2014

3. Characterization of the Hot Deformation Behavior of a Al-Si Alloy Using Processing Maps

Author

Jinhui Wang, Li Han, Ming Liang Wang, and Pei Peng Jin

Subjects
Hot working, Materials science, Metallurgy, Alloy, General Engineering, engineering, Strain rate, engineering.material, Deformation (engineering), Flow stress, Atmospheric temperature range, Microstructure, Adiabatic shear band
Abstract

The compression tests of solution treatment ZL109 alloy have been performed in the compression temperature range from 250°C to 450°C and the strain rate range from 0.0005s-1to 0.5s-1. A processing map has been developed on the basis of flow stress data obtained as a function of temperature and strain rate, which revealed two domains of hot working for the alloy: one is situated at temperature between 270°C and 340°C with strain rate between 0.05s-1and 0.5s-1, the other is situated at the temperature between 380°C and 450°C with strain rate between 0.0005s-1and 0.004s-1. Combining with the processing map, the optimum parameters of hot working for ZL109 alloy are that 300°C/0.5s-1and 450°C/0.0005s-1, respectively. Microstructure observations indicated that DRX occurred in both these domains. The instable zones, i. e., adiabatic shear bands formation, wedge cracking, were also identified in the processing map and microstructural examination was performed for validation.

Published
2013

4. The Design of Jacquard Fabric with Optical Fiber for Effect of Leaves Falling

Author

Rui Peng Jin, Zi Min Jin, Xue Qin Wang, and Bin Yang

Subjects
Textile, Optical fiber, Materials science, business.industry, law, General Engineering, Composite material, business, Fabric structure, Dynamic display, law.invention
Abstract

The optical jacquard decorative fabric which had patterns in dynamic display was woven with side-emitting polymer optical fibers (POF) and common textile fibers. The side-emitting POFs were designed as surface wefts in luminous parts of the fabric, and the POFs were back in other parts. These POFs were divided into different groups according to luminous sequence. Then the POFs were connected with light sources and a specific circuit. Finally the patterns of fabric could display like animation. When POFs didnt emit light, the fabric kept the effect of traditional jacquard fabric.

Published
2013

5. Thermodynamic Analysis Method for Iron and Steel Manufacturing System Based on Enthalpy Balance

Author

Peng Jin, Bi Yang Chen, Ze Yi Jiang, Fu Shan Tian, and Xin Xin Zhang

Subjects
Blast furnace, business.industry, Chemistry, Forms of energy, Flow (psychology), Enthalpy, General Engineering, Energy balance, Thermodynamics, Energy consumption, Steel mill, Energy flow, Process engineering, business
Abstract

Thermodynamic analysis method for iron and steel manufacturing system is developed to describe the energy flow. The theoretical energy consumption for the manufacturing process is proposed to analyze the energy-saving potential. Energy balance based on enthalpy with a uniform reference state is established to analyze the amounts and forms of energy flow in the manufacturing system. The energy-saving potential of blast furnace system is discussed to choose the appropriate energy-saving methods and technologies.

Published
2012

6. Study on Crack Behavior of Recycled Fine Aggregate Concrete under Axial Compressive Load

Author

Jun Zhou, Li Sha Ma, Zheng Wen Zhang, Yi Qi Tu, Peng Jin, Xu Chao Chi, Xiao Yi Wang, and Huan Li Wang

Subjects
Compressive load, Ultimate load, Cracking, Materials science, business.industry, General Engineering, Structural engineering, Composite material, business, Curing (chemistry)
Abstract

In order to effective utilize of recycled fine aggregate concrete (RFAC), it is necessary to clearly understand its behavior and characteristic. In this paper, experimental study on crack behavior of RFAC was conducted with different curing ages. Ratio of its cracking load to ultimate load was analyzed in detail. Experiment shows that this ratio is about 0.8 and is not sensitive to curing age. Comparison to traditional concrete was performed. The result of this paper is helpful to theoretical analysis and practical engineering design of RAC structures.

Published
2010

Catalog

Books, media, physical & digital resources
See catalog results