Fabrication and damping capacity of CuZnAl matrix composites processed by powder metallurgy route

The graphite and alumina particles reinforced Al matrix composites with graphite up to 5 vol% was prepared by Reciprocating Extrusion (RE). Damping behavior of the composites was measured by dynamic mechanical thermal analyzer. The composites showed more excellent damping Q-1 than pure Al manufactured by RE, and the ambient value was 9.9×10-3 at 5 Hz when the strain amplitude was 8×10-8. The damping behavior of the composites showed slight variation with frequency. The damping capacity increased with increasing of the strain amplitude when the amplitude less than 1.5×10-6, and then became a constant and independent of strain amplitude. The high damping capacity was attributed to micro-sliding interface damping and the dislocation damping.

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Modelling of carbon nanotube dispersion and strengthening mechanisms in Al matrix composites prepared by high energy ball milling-powder metallurgy method

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2016.11.029 ◽

2017 ◽

Vol 94 ◽

pp. 189-198 ◽

Cited By ~ 34

Author(s):

Z.Y. Liu ◽

B.L. Xiao ◽

W.G. Wang ◽

Z.Y. Ma

Keyword(s):

Powder Metallurgy ◽

High Energy ◽

Powder Metallurgy Method ◽

Matrix Composites ◽

Strengthening Mechanisms ◽

Carbon Nanotube Dispersion ◽

Energy Ball ◽

Al Matrix Composites ◽

Nanotube Dispersion ◽

Al Matrix

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DAMPING CAPACITY OF Bi2O3--COATED Al18B4O33 WHISKER REINFORCED Al MATRIX COMPOSITES

ACTA METALLURGICA SINICA ◽

10.3724/sp.j.1037.2010.00067 ◽

2010 ◽

Vol 46 (8) ◽

pp. 979-983

Author(s):

Gang LIU ◽

Yali SUN ◽

Jin HU ◽

Ke ZHOU

Keyword(s):

Damping Capacity ◽

Matrix Composites ◽

Al Matrix Composites ◽

Al Matrix

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Mechanical and Electrical Properties of Nano Al-Matrix Composites Reinforced with SiC and Prepared by Powder Metallurgy

Biointerface Research in Applied Chemistry ◽

10.33263/briac122.20682083 ◽

2021 ◽

Vol 12 (2) ◽

pp. 2068-2083

Keyword(s):

Mechanical Properties ◽

Electrical Conductivity ◽

Compressive Strength ◽

Electron Microscope ◽

Powder Metallurgy ◽

Relative Density ◽

Apparent Porosity ◽

Matrix Composites ◽

Al Matrix Composites ◽

Al Matrix

Nano Al-matrix composites reinforced with SiC were prepared by powder metallurgy process. The percentages of added SiC were varied between 0, 2, 4, 6, and 8 wt. %. The starting powders were milled in high-energy ball mill for 10hrs to convert into nanopowders; then compacted and sintered for 1h in an argon atmosphere at 400, 500, and 570°C. X-ray technique and transmission electron-microscope were utilized to examine the prepared powders, while scanning electron-microscope was utilized to test the sintered composites. The relative density, apparent porosity, electrical conductivity, and mechanical properties (microhardness, elastic moduli, and compressive strength) of sintered composites were studied. The results showed no sign for phase changes after milling, and the SiC reinforcement was uniformly distributed in the matrix. The relative density and electrical conductivity were decreased with increasing SiC content, while the apparent porosity was increased. It is also found that the mechanical properties were improved with increasing SiC content. Also, all properties were improved with increasing sintering temperature. The hardness, compressive strength, bulk modulus of Al-8wt.% SiC composite sintered at 570°C were 885.4 MPa, 276.2 MPa, and 135.9 GPa, respectively.

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