TY - JOUR
T1 - Stabilizing the L12 structure of Pt3Al(r) in the Pt-Al-Sc system
AU - Völkl, R.
AU - Yamabe-Mitarai, Y.
AU - Huang, C.
AU - Harada, H.
N1 - Funding Information:
This work was conducted within the context of High Temperature Materials 21 Project at the National Institute for Materials Science (Tsukuba, Japan). The authors thankfully acknowledge the Japan Society for the Promotion of Science for financial support in the form of a research fellowship for Mr. Völkl. The assistance of Mr. Nishida with the EPMA analysis is greatly appreciated.
PY - 2005/11
Y1 - 2005/11
N2 - The Pt-Al system has high potential to act as alloy base for so-called refractory superalloys. Although the envisaged strengthening phase Pt3Al(r) has favorable L12 crystal structure only at high temperatures, even small amounts of Sc stabilized L12 crystal structure at low temperature. Pt-Al-Sc alloys were are melted, heat treated, and examined by means of scanning electron microscopy and X-ray diffraction (XRD). Pt3Al1-xScx(r) forms a continuous phase field from the Al-rich side to the Sc-rich side of the Pt-Al-Sc ternary system. The absolute value of the lattice misfit between cubic Pt3Al1-xScx(r) and the matrix decreases with increasing Sc content.
AB - The Pt-Al system has high potential to act as alloy base for so-called refractory superalloys. Although the envisaged strengthening phase Pt3Al(r) has favorable L12 crystal structure only at high temperatures, even small amounts of Sc stabilized L12 crystal structure at low temperature. Pt-Al-Sc alloys were are melted, heat treated, and examined by means of scanning electron microscopy and X-ray diffraction (XRD). Pt3Al1-xScx(r) forms a continuous phase field from the Al-rich side to the Sc-rich side of the Pt-Al-Sc ternary system. The absolute value of the lattice misfit between cubic Pt3Al1-xScx(r) and the matrix decreases with increasing Sc content.
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U2 - 10.1007/s11661-005-0061-z
DO - 10.1007/s11661-005-0061-z
M3 - Article
AN - SCOPUS:28444498370
VL - 36
SP - 2881
EP - 2892
JO - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
JF - Metallurgical Transactions A (Physical Metallurgy and Materials Science)
SN - 1073-5623
IS - 11
ER -