| Full text | |
| Author(s): |
Lopes, Eder S. N.
[1]
;
Dal Bo, Mariana R.
[1]
;
Opini, Victor C.
[1]
;
de Mello, Mariana G.
[1]
;
Rios, Carlos T.
[2]
;
Fraser, Hamish L.
[3]
;
Caram, Rubens
[1]
Total Authors: 7
|
| Affiliation: | [1] Univ Estadual Campinas, Sch Mech Engn, BR-13083860 Campinas, SP - Brazil
[2] Fed Univ ABC, Engn Modeling & Appl Social Sci Ctr, BR-09210580 Santo Andre, SP - Brazil
[3] Ohio State Univ, Dept Mat Sci & Engn, Ctr Accelerated Maturat Mat, 1305 Kinnear Rd, Columbus, OH 43212 - USA
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | MATERIALS CHARACTERIZATION; v. 147, p. 303-310, JAN 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Under directional growth, the eutectic transformation L reversible arrow Al3Nb + Nb2Al + Nb(Ni(1-x)Alx)(2) resulted in a very organized three phase microstructure. While many features of this eutectic have already been explored, crystal-lographic details of its phases are still missing. This paper aims to investigate composition and crystallographic features of a directionally solidified eutectic made up of the Al3Nb, Nb2Al and Nb(Ni1-xAlx)(2) phases. It was observed that the Nb(Ni1-xAlx)(2) intermetallic phase has the C14 structure, with composition 56.91 +/- 0.43 at.% Al, 10.11 +/- 0.12 at.% Ni and 32.98 +/- 0.53 at.% Nb. Selected area diffraction in a transmission electron microscope permitted interplanar spacings to be determined and values obtained are consistent with those in the literature. Accurate lattice parameters were determined using powder X-ray diffraction combined with Rietveld refinement. It was found that the lattice parameters of the Nb(Ni1-xAlx)(2) (x = 0.85) phase are a = 5.031 angstrom and c = 8.298 angstrom and these lattice parameters depend on Al content. (AU) | |
| FAPESP's process: | 13/50391-6 - Non-classical mechanisms of solid-state precipitation in Ti alloys |
| Grantee: | Rubens Caram Junior |
| Support Opportunities: | Regular Research Grants |