TY - JOUR
T1 - Icosahedral and related phase formation in rapidly quenched Ti-Zr-Fe alloys
AU - Kim, W. J.
AU - Kelton, K. F.
PY - 1995/11
Y1 - 1995/11
N2 - We report the formation of the icosahderal phase (i-phase) in some rapidly quenched Tix, Zry, Fez, (45 ≤ × ≤ 70; 5 ≤ y ≤ 25; 20 ≤ z ≤ 30) alloys. Transmission electron microscopy (TEM) studies show that unlike the Ti-Zr-Ni i-phase, i(TiZrFe) is strongly disordered, showing strong spot anisotropy and intense localized diffuse scattering. These features, and a smaller quasilattice constant for i(TiZrFe) (a0 = 4.85Å) than for i(TiZrNi) (a0 = 5.12), indicate that i(TiZrFe) is more closely related to the icosahedral phases found in Ti-3d transition metal-Si alloys. TEM studies also reveal many related crystalline phases dominated by local polytetrahedral order, including α(TiZrFe), a bcc phase that is a 1/1 approximant to the i-phase, the λ-phase, an orthorhombic phase that appears to be an approximant to a decagonal phase, a Laves phase of the hexagonal MgZn2-type, and a Ti2Ni-type fcc phase. Evidence for ordering in the α(TiZrFe) and bcc solid solution phases is presented.
AB - We report the formation of the icosahderal phase (i-phase) in some rapidly quenched Tix, Zry, Fez, (45 ≤ × ≤ 70; 5 ≤ y ≤ 25; 20 ≤ z ≤ 30) alloys. Transmission electron microscopy (TEM) studies show that unlike the Ti-Zr-Ni i-phase, i(TiZrFe) is strongly disordered, showing strong spot anisotropy and intense localized diffuse scattering. These features, and a smaller quasilattice constant for i(TiZrFe) (a0 = 4.85Å) than for i(TiZrNi) (a0 = 5.12), indicate that i(TiZrFe) is more closely related to the icosahedral phases found in Ti-3d transition metal-Si alloys. TEM studies also reveal many related crystalline phases dominated by local polytetrahedral order, including α(TiZrFe), a bcc phase that is a 1/1 approximant to the i-phase, the λ-phase, an orthorhombic phase that appears to be an approximant to a decagonal phase, a Laves phase of the hexagonal MgZn2-type, and a Ti2Ni-type fcc phase. Evidence for ordering in the α(TiZrFe) and bcc solid solution phases is presented.
UR - https://www.scopus.com/pages/publications/21844510839
U2 - 10.1080/01418619508236263
DO - 10.1080/01418619508236263
M3 - Article
AN - SCOPUS:21844510839
SN - 0141-8610
VL - 72
SP - 1397
EP - 1408
JO - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
JF - Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
IS - 5
ER -