&lt;title&gt;Production of metal matrix composite mirrors for tank fire control systems&lt;/title&gt;

Geiger, Alan L.; Ulph, Eric

doi:10.1117/12.137998

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“…A wide range of space-based measurement applications require lightweight large-scale mirror systems. 1 To attain accurate image under thermal cycling condition, SiC particles reinforced aluminum matrix composite (SiC p /Al) with SiC volume fraction more than 60% is chosen as the new optical material to replace traditional mirror materials, such as aluminum, Zerodur and ULE glass, 2 because of its low coefficient of thermal expansion (CTE), high specific rigidity and high thermal conductivity (TC). 3,4 The most favored methods for fabrication of high volume fraction SiC p /Al composite is pressure infiltration technology.…”

Section: Introductionmentioning

confidence: 99%

Influence of particle size distribution on properties of SiC particles reinforced aluminum matrix composites with high SiC particle content

Lou

2015

Journal of Composite Materials

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In this paper, 60.5–68.0 vol.% SiCp/Al composites were prepared by infiltrating liquid aluminum into preforms. The average diameters of SiC particles used in the particles packing experiments were 45, 8 and 2 µm for the group I preforms, and 75, 8 and 2 µm for the group II preforms. The thermal-mechanical properties of the composites were investigated. The mechanical properties test showed that the tensile strength of the composites was in the range of 212–349 MPa, and the elastic modulus of the composites was greater than 150 GPa. For a given SiC volume fraction, the tensile strength and elastic modulus of the group I composites were greater than that of the group II composites. The thermal properties test revealed that the coefficient of thermal expansion of the composites was in the range of 10.33–12.32 × 10–6/℃, and the measured thermal conductivity of the composites was greater than 85.6 W/(m·℃). The change of the particle size distribution had no effect on the coefficient of thermal expansion, and the coefficient of thermal expansion decreased linearly with the increase of SiC content. An average diameter approach for estimating the thermal conductivity of the composites was proposed in the application of Hasselman-Johnson model. The results indicated that the predictions of the model were in good agreement with the measured thermal conductivity of the composites.

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Section: Introductionmentioning

confidence: 99%

Influence of particle size distribution on properties of SiC particles reinforced aluminum matrix composites with high SiC particle content

Lou

2015

Journal of Composite Materials

View full text Add to dashboard Cite

show abstract

<title>Production of metal matrix composite mirrors for tank fire control systems</title>

Cited by 1 publication

References 0 publications

Influence of particle size distribution on properties of SiC particles reinforced aluminum matrix composites with high SiC particle content

Influence of particle size distribution on properties of SiC particles reinforced aluminum matrix composites with high SiC particle content

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