Synthesis of metastable A-15 superconducting compounds by ion implantation and electron-beam annealing. Technical progress report
Technical Report
·
OSTI ID:6941640
The effects are studied of high-dose implantation of B and C into Nb/sub 3/Al alloys. This particular system was chosen because of its superconducting properties. Nb/sub 3/Al has a-high superconducting transition temperature T/sub c/ of 18 K and has the A-15 structure. Most high T/sub c/ materials seem to involve metastable materials and in particular metastable A-15's. There is empirical speculation that as the B atom in the A/sub 3/B A-15 structure decreases in size, the transition temperature increased. This increase in T/sub c/ appears to be associated with a decrease in lattice parameter and a rapprochement of the Nb atoms. A attempt is made to gradually replace the Al atoms by the smaller B and C atoms. Normal alloying of B and C with Nb/sub 3/Al will make the A-15 structure unstable. Ion implantation of B and C is a good approach for attempting to synthesize metastable A-15 Nb/sub 3/Al/sub 1-x/B/sub x/ and Nb/sub 3/Al/sub 1-x/C/sub x/ (x = 0 to 1).
- Research Organization:
- Massachusetts Univ., Amherst (USA). Dept. of Mechanical Engineering
- DOE Contract Number:
- AC02-80ER10566
- OSTI ID:
- 6941640
- Report Number(s):
- DOE/ER/10566-T1; ON: DE82021627
- Country of Publication:
- United States
- Language:
- English
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