Effects of SiC particulates on the fatigue behaviour of an Al-alloy matrix composite

2006 ◽  
Vol 27 (9) ◽  
pp. 776-782 ◽  
Author(s):  
Cevdet Kaynak ◽  
Suha Boylu
Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1767
Author(s):  
Yuhong Jiao ◽  
Jianfeng Zhu ◽  
Xuelin Li ◽  
Chunjie Shi ◽  
Bo Lu ◽  
...  

Al matrix composite, reinforced with the in situ synthesized 3C–SiC, MgAl2O4, and MgO grains, was produced via the casting process using phenolic resin pyrolysis products in flash mode. The contents and microstructure of the composites’ fracture characteristics were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Mechanical properties were tested by universal testing machine. Owing to the strong propulsion formed in turbulent flow in the pyrolysis process, nano-ceramic grains were formed in the resin pyrolysis process and simultaneously were homogeneously scattered in the alloy matrix. Thermodynamic calculation supported that the gas products, as carbon and oxygen sources, had a different chemical activity on in situ growth. In addition, ceramic (3C–SiC, MgAl2O4, and MgO) grains have discrepant contents. Resin pyrolysis in the molten alloy decreased oxide slag but increased pores in the alloy matrix. Tensile strength (142.6 ± 3.5 MPa) had no change due to the cooperative action of increased pores and fine grains; the bending and compression strength was increasing under increased contents of ceramic grains; the maximum bending strength was 378.2 MPa in 1.5% resin-added samples; and the maximum compression strength was 299.4 MPa. Lath-shaped Si was the primary effect factor of mechanical properties. The failure mechanism was controlled by transcrystalline rupture mechanism. We explain that the effects of the ceramic grains formed in the hot process at the condition of the resin exist in mold or other accessory materials. Meanwhile, a novel ceramic-reinforced Al matrix was provided. The organic gas was an excellent source of carbon, nitrogen, and oxygen to in situ ceramic grains in Al alloy.


2005 ◽  
Vol 46 (2) ◽  
pp. 148-151 ◽  
Author(s):  
Yibin Xu ◽  
Yoshihisa Tanaka ◽  
Masaharu Murata ◽  
Kazushige Kamihira ◽  
Yukihiro Isoda ◽  
...  

2012 ◽  
Vol 26 (6) ◽  
pp. 1741-1746 ◽  
Author(s):  
Wonjo Park ◽  
Cheolhong Park ◽  
Hyungjin Kim ◽  
Sunchul Huh

2007 ◽  
Vol 29-30 ◽  
pp. 249-253
Author(s):  
Kee Do Woo ◽  
I.B. Lee ◽  
I.Y. Kim ◽  
De Liang Zhang

The displacement reaction (in situ reaction) is an effective process to solve the interfacial problem between Al matrix and ceramic particles in Al alloy matrix composites. In this study, an Al alloy matrix composite powder containing nanometer was produced by using high energy ball milling, and a bulk Al alloy matrix composite reinforced with nanometer and submicrometer sized Al2O3 particles was obtained by sintering the ball milled composite powder at 950 °C for 2h. It was found that the Al2O3 particles were homogeneously distributed in the Al matrix after sintering. Some of the Si particles have lots of fine Al2O3 particles distributed homogeneously in the Al matrix. The hardness of the sintered specimen produced using as-milled composite powder is higher than that of the sintered specimen produced using as-mixed powder.


Materia Japan ◽  
1997 ◽  
Vol 36 (4) ◽  
pp. 349-351 ◽  
Author(s):  
Tetsuya Nukami ◽  
Akira Kato ◽  
Yukio Okochi ◽  
Masahiko Sugiyama

2004 ◽  
Vol 95 (2) ◽  
pp. 722-726 ◽  
Author(s):  
Yibin Xu ◽  
Yoshihisa Tanaka ◽  
Masahiro Goto ◽  
You Zhou ◽  
Koichi Yagi

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