Sage Journals: Discover world-class research

Abstract

The tensile properties of two types of alumina (Al₂O₃ and Al₂O₃–SiO₂) and short fiber-reinforced A366 alloy composite created by low-pressure infiltration have been studied. The applied pressure and temperature of molten alloy are 0.4 MPa and 1073 K, respectively. The composite containing 10 vol.% of fiber preform was sectioned and the microstructure was observed by scanning electron microscopy and energy dispersive X-ray spectroscopy. Tensile properties of Al₂O₃ fiber-reinforced A366 alloy composites were investigated, in conjunction with investigation of effects of amounts of SiO₂ sol added as binder to fabricated preform and effects of changed chemical composition of Al₂O₃ fiber. The composite with SiO₂ sol of 8 mass% has higher relative density in comparison with composite with SiO₂ sol of 2 mass%. SiO₂ sol raised the relative density of composite by the reaction with aluminum. In addition, the ultimate tensile strength of composite which has Al₂O₃ fiber-reinforced A366 alloy composite containing SiO₂ sol of 8 mass% was approximately 20% higher than that of Al₂O₃–SiO₂ fiber-reinforced A366 alloy composite containing SiO₂ sol of 8 mass%.

Keywords

low-pressure infiltration composites short fiber tensile strength fracture behavior

Get full access to this article

View all access options for this article.

References

Badini

Fino

Musso

. Thermal fatigue behaviour of a 2014/Al₂O₃-SiO₂ (Saffil Fibre) composite processed by squeeze casting. Mater Chem Phys 2000; 64: 247–255.

Bahraini

Minghetti

Zoellig

. Activated pressureless infiltration of metal-matrix composites with graded activator content. Compos Part A 2009; 40: 1566–1572.

Tjong

Liao

. Wear behavior of an Al-12% Si alloy reinforced with a low volume fraction of SiC particles. Compos Sci Technol 1998; 57: 1551–1558.

Seo

Kang

. The effect of applied pressure on particle dispersion characteristics and mechanical properties in melt stirring squeeze cast SiCp/Al composites. J Mater Process Technol 1995; 55: 370–379.

Choi

Sasaki

Matsugi

. Low Pressure casting process of FeCrSi/A366.0 alloy composites and their characterization. Key Eng Mater 2006; 326–328: 1741–1744.

Lee

Choi

Sugio

. Preparation of unidirectional carbon fiber preform for Aluminum matrix composites. Mater Trans 2011; 52: 939–942.

Lee

Choi

Sugio

. Fabrication and characterization of unidirectional CF/Al composites. Sci Eng Compos Mater 2011; 18: 167–171.

Kang

Seo

. The influence of fabrication parameters on the deformation behavior of the preform of metal-matrix composites during the squeeze-casting processes. J Mater Process Technol 1996; 61: 241–249.

Kehoe F, Chadwick G. Mechanical and physical properties of squeeze-cast aluminum steel matrix composites containing 5%–30% Saffil. Mater Sci Eng A – Struct Mater 1991; 135: 209–212.

10.

Ksiazek

Sobczak

Mikulowski

. Wetting and bonding strength in Al/Al₂O₃ system. Mater Sci Eng A 2002; 324: 162–167.

11.

Sun

. Coating of Y₂O₃ additive on Al₂O₃ powder and its effect on the wetting behavior in the system Al₂O_3p/Al. Mater Lett 2003; 57: 3111–3116.

12.

Laurent

Chatain

Chatillona

. Wettability of monocrystalline alumina by aluminum between its melting point and 1273 K. Acta Metall 1988; 36: 1797–1803.

13.

Laurent

Chatain

Eustathopoulos

. Wettability of SiO₂ and oxidized SiC by aluminum. Mater Sci Eng A 1991; 135: 89–94.

14.

Baxter

Sachdev

. The Tensile Strength of Kaowool and Saffil Reinforced 339 Aluminum. Scr Mater 1998; 38: 1589–1593.

Effect of SiO 2 amount on microstructures and tensile properties of alumina short fiber-reinforced composites by low-pressure infiltration method

Abstract

Keywords

Get full access to this article

References