Structural Analysis of Electroplated Amorphous-Nanocrystalline Ni-W |
| |
Authors: | Peter Schloßmacher Tohru Yamasaki |
| |
Institution: | (1) Forschungszentrum Karlsruhe, Institute for Materials Research I, P.O. Box 3640, 76021 Karlsruhe, Germany, DE;(2) Department of Materials Science & Engineering, Himeji Institute of Technology, 2167 Shosha, Himeji, Hyogo 671-2201, Japan, JP |
| |
Abstract: | Ductile nickel-tungsten (Ni-W) alloys containing about 20–21 at.%W were electroplated onto copper substrates. The development
of the amorphous/nanocrystalline microstructure towards a complete crystallization by isochronal heat treatments in vacuum
was monitored by different methods. For medium annealing temperatures a solid-solution of W in the fcc-Ni lattice was achieved
resulting in an increased hardness. For temperatures of 600 °C and upward recrystallization started and thermodynamically
stable intermetallic compounds like Ni4W and NiW were formed. A third phase, containing more than 80 at.%W was also detected but could not be identified so far.
Only by combination of different methods and especially by use of analytical TEM structural analysis and phase identification
in these amorphous-nanocrystalline Ni-W alloys were successful. |
| |
Keywords: | : Nickel-tungsten alloys electroplating analytical TEM nanocrystalline materials |
本文献已被 SpringerLink 等数据库收录! |
|