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Study on the Al2O3 Particles Reinforced Aluminum Matrix Composites

Author: ZhuRuiJie
Tutor: ZhangYong
School: Shandong University of Technology
Course: Materials Processing Engineering
Keywords: Vacuum casting Al2O3 particles Aluminum matrix composites Microstructure Performance
CLC: TB331
Type: Master's thesis
Year: 2008
Downloads: 278
Quote: 2
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Abstract


Al 2 O 3 / Al composites with excellent electrical conductivity , thermal conductivity , wear resistance and low coefficient of thermal expansion , caused a great deal of attention in the industry . This paper studies the the a preparation the Al 2 < / sub > O 3 < / sub > / Al composites new method can be used for the production of high quality air compressor cylinder liner in the study design and manufacturing a special preparation device , the device is the first to use the electromagnetic and mechanical composite under vacuum mixing technology ; preparation of the volume fraction of 5%, 10 % , 15%, 20 % Al 2 O the 3 / Al composite samples , and by analyzing the microstructure of the matrix material and composite materials , wear resistance and mechanical properties test , made ??a comparative analysis of gray cast iron and 45 carbon steel has been the following main conclusions : (1) Al 2 O 3 / Al composites with excellent wear resistance , oil lubrication conditions , the composite wear resistance than the matrix The alloy is an order of magnitude . Worn surface microscopic analysis showed that the composite wear process is the result of the combined action of two mechanisms adhesive and abrasive wear . ( 2 ) scanning electron microscope microscopic analysis showed that when the the joined Al 2 < / sub > O 3 < / sub > particle volume fraction is more than 10% , Al 2 O 3 particle agglomeration and aggregation , process parameters need to be further optimized . ( 3 ) at a certain volume fraction , the tensile strength of the composite material with Al 2 < / sub > O 3 < / sub > increase of the particle volume fraction increases , but reinforced the Al 2 O 3 particles excessive gathering area of composite reinforcement and reinforcement / enhance the the body interface but will deteriorate the mechanical properties of materials . (4) join Al 2 < / sub > O 3 < / sub > particle volume fraction of 10 % of the samples the best wear resistance , wear resistance than gray cast iron and 45 steel , but mechanical properties slightly lower than the gray cast iron and 45 steel, is expected to become an alternative material of the air compressor cylinder liner .

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials > Metal composite materials
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