Refractory metallic glasses

✍ Scribed by L. Rohr; P. Reimann; T. Richmond; H.-J. Güntherodt

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 197 KB
• Volume: 133
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(91)90169-n

✦ Synopsis

A splat-cooling device with a levitation coil has been modified and combined with a continuous CO~ laser of 1.4 kW to provide the additional heating of the levitating alloy droplets to temperatures up to 3500 K. This equipment is suitable for preparing rapidly quenched glassy and crystalline alloys of refractory metals from the melt. First results on alloys containing iridium, molybdenum, rhodium, tantalum and tungsten are reported. The splats were shown to be amorphous by X-ray diffraction. Some resistivity and DTA measurements have also been performed. Interesting properties such as high crystallization temperatures and high values of Vickers hardness are measured. Promising applications are in the field of brazing foils for ceramics.