TY - GEN
T1 - Corrosion behavior of Al-Al3Ni and Al-Al2Cu functionally graded materials fabricated by a centrifugal method
AU - Noda, Kazuhiko
AU - Miyahara, Keita
AU - Watanabe, Yoshimi
PY - 2008/3/13
Y1 - 2008/3/13
N2 - Intermetallic compounds, such as Al3Ni and Al2Cu, are effective for enhancing the mechanical properties of an alloy. Al-Al 3Ni and Al-Al2Cu functionally graded materials (FGMs) might be attractive materials for advanced materials. Al-Al3Ni and Al-Al2Cu FGMs were fabricated by a centrifugal method; the centrifugal method is an extremely effective method for fabricating FGMs. Al-Al3Ni and Al-Al2Cu FGMs that had a graded distribution of intermetallic compounds could be produced by this in-situ centrifugal method. Particle size, particle shape and the distribution of intermetallic compounds were controlled by varying the content of the alloy element (Ni, Cu) in the master alloy, the cooling rate in casting and the gravity number. The casting mechanism is explained in terms of the microstructures of the Al-Al 3Ni and Al-Al2Cu FGMs fabricated by this method. The corrosion behavior of the FGMs was investigated by electrochemical analysis. Polarization curves of the FGMs in a borate solution were measured by a potentiodynamic method. The presence of Al2Cu exerted a larger effect on the corrosion behavior of the FGMs than Al3Ni. Analysis of the polarization curve parameters was effective for evaluating the corrosion resistance of the FGMs.
AB - Intermetallic compounds, such as Al3Ni and Al2Cu, are effective for enhancing the mechanical properties of an alloy. Al-Al 3Ni and Al-Al2Cu functionally graded materials (FGMs) might be attractive materials for advanced materials. Al-Al3Ni and Al-Al2Cu FGMs were fabricated by a centrifugal method; the centrifugal method is an extremely effective method for fabricating FGMs. Al-Al3Ni and Al-Al2Cu FGMs that had a graded distribution of intermetallic compounds could be produced by this in-situ centrifugal method. Particle size, particle shape and the distribution of intermetallic compounds were controlled by varying the content of the alloy element (Ni, Cu) in the master alloy, the cooling rate in casting and the gravity number. The casting mechanism is explained in terms of the microstructures of the Al-Al 3Ni and Al-Al2Cu FGMs fabricated by this method. The corrosion behavior of the FGMs was investigated by electrochemical analysis. Polarization curves of the FGMs in a borate solution were measured by a potentiodynamic method. The presence of Al2Cu exerted a larger effect on the corrosion behavior of the FGMs than Al3Ni. Analysis of the polarization curve parameters was effective for evaluating the corrosion resistance of the FGMs.
KW - Centrifugal force method
KW - Corrosion
KW - FGMs
KW - Intermetallic compounds
UR - http://www.scopus.com/inward/record.url?scp=40449089865&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=40449089865&partnerID=8YFLogxK
U2 - 10.1063/1.2896842
DO - 10.1063/1.2896842
M3 - Conference contribution
AN - SCOPUS:40449089865
SN - 9780735404922
T3 - AIP Conference Proceedings
SP - 574
EP - 578
BT - Multiscale and Functionally Graded Materials - Proceedings of the International Conference, FGM IX
T2 - 9th International Conference on Multiscale and Functionally Graded Materials, FGM IX
Y2 - 15 October 2006 through 18 October 2006
ER -