Preparation of Al2O3 Nano-Particles Reinforced Fe-Based Composite Materials via In Situ Synthesis

2012 ◽  
Vol 476-478 ◽  
pp. 1287-1290 ◽  
Author(s):  
Rui Rui Fan ◽  
Yan Li ◽  
Liu Jie Xu ◽  
Shi Zhong Wei

Al2O3 reinforced iron based composite were prepared via in-situ synthesis with aluminum nitrate, citric acid and iron powder as raw materials, a little C and Mo as additive. The influences of the contents of Al2O3, C and Mo on the microstructure and micro-hardness of the Fe based composites were characterized by XRD, SEM, TEM and micro-hardness tester. The results showed that the Fe-based composite materials with high bonding strength between matrix and Al2O3 can be prepared by in situ synthesis method. The best ratio of the nine Al2O3 particles reinforced Fe-based composite materials in three groups is 3vol. % C, 5vol. % or 7vol. % Al2O3, sintering temperature is 1300°C and quenching temperature is 900°C. The microstructure of the matrix without C addition is ferrite before and after quenching; the microstructure of the matrix with C addition is pearlite before quenching, and the microstructure become to martensite after quenching, the α-Al2O3 and FeC3 are reinforced phases. The microstructure of the matrix with Mo addition is ferrite and FeAl2O4 before and after quenching.

2006 ◽  
Vol 13 (1) ◽  
pp. 70-74 ◽  
Author(s):  
Lin Li ◽  
Yan-ruo Hong ◽  
Jia-lin Sun ◽  
Zhi-yong He ◽  
Xiao-yan Peng

2021 ◽  
Author(s):  
Jiahong Tian ◽  
Runhua Fan ◽  
Zongxiang Wang ◽  
Jiahao Xin ◽  
Zhongyang Wang

Abstract Silver/polyaniline (Ag/PANI) composites were prepared by an in-situ synthesis method. Interestingly, the permittivity changed from positive to negative along with the formation of percolation network. The plasma oscillations of free electrons from the network made a dominant effect on the negative permittivity behavior. Further investigation based on equivalent circuit analysis revealed that the composites with negative permittivity presented inductive character. The epsilon-negative composites can be applied to electromagnetic shielding, absorbing and attenuation.


2012 ◽  
pp. 189-198 ◽  
Author(s):  
Jelena Petrovic ◽  
Darko Ljubic ◽  
Marina Stamenovic ◽  
Ivana Dimic ◽  
Slavisa Putic

The significance of composite materials and their applications are mainly due to their good properties. This imposes the need for their recycling, thus extending their lifetime. Once used composite material will be disposed as a waste at the end of it service life. After recycling, this kind of waste can be used as raw materials for the production of same material, which raises their applicability. This indicates a great importance of recycling as a method of the renowal of composite materials. This study represents a contribution to the field of mechanical properties of the recycled composite materials. The tension mechanical properties (tensile strength and modulus of elasticity) of once used and disposed glass-epoxy composite material were compared before and after the recycling. The obtained results from mechanical tests confirmed that the applied recycling method was suitable for glass-epoxy composite materials. In respect to the tensile strength and modulus of elasticity it can be further assessed the possibility of use of recycled glass-epoxy composite materials.


2017 ◽  
Vol 711 ◽  
pp. 1-7 ◽  
Author(s):  
Haixia Qin ◽  
Yong Li ◽  
Peng Jiang ◽  
Wendong Xue ◽  
Shanghao Tong ◽  
...  

2012 ◽  
Vol 151 ◽  
pp. 157-162 ◽  
Author(s):  
Kun Kun Han ◽  
Li Ma ◽  
Hui Min Zhao ◽  
Xun Li ◽  
Yuan Chun ◽  
...  

2020 ◽  
Vol 48 (4) ◽  
pp. 456-465 ◽  
Author(s):  
Xiao-liu WANG ◽  
Meng YANG ◽  
Ling-jun ZHU ◽  
Xiao-nan ZHU ◽  
Shu-rong WANG

2012 ◽  
Vol 616-618 ◽  
pp. 1736-1740
Author(s):  
Lei Jiao ◽  
Yu Tao Zhao ◽  
Zhong Zhong Zhang ◽  
Yan Wei Yang ◽  
Ming Rui Zhang

With pulse magnetic field, it is use 2124-K2ZrF6-KBF4 as matrix metal to produce chemical reaction to gain (Al3Zr+ZrB2) p/2124 composite materials in this paper. In this paper, For the sake of researching the microstructure, the morphology, the size and the matrix distribution characteristics of the reinforced grain of prepared composite material , those test methods are used, such as optical microscopy, scanning electron microscope, X-ray diffraction analysis and so on. We will research the magnetic field strength how to influence size and distribution of Al3Zr +ZrB2 particle and the abrasion performance of (Al3Zr+ZrB2)P/2124 composite materials in the room temperature. Wear experiment is proceeding in the CETR UMT 3-V the testing machine and sliding friction is friction way with pin-disc but without lubricant, then analyzes the wear mechanism.


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