Development of sputter coatings for the gravity probe B gyroscope housingsCu/Ti coatings have been applied by sputter deposition to fused quartz housings to serve as the electrodes and lands of electrostatically supported gyroscopes. Niobium-coated fused quartz gyro rotors have been successfully suspended and spun up in those housings. The Cu/Ti bilayer coating and alternative multilayer coatings (Cu/Mo, Mo/Cu/Ti and Mo/Cu/Mo) with 2-micron thickness produced by sputter deposition on flat, fused quartz substrates have been examined with scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and four-point resistivity measurement techniques. The multilayer coatings with a molybdenum bonding layer appear to produce smoother surfaces than those with a titanium bonding layer. All multilayer coatings survived thermal cycling to 77 K without adhesion failure.
Document ID
19890066905
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Zhou, P. (Stanford Univ. CA, United States)
Cheung, S. (Stanford Univ. CA, United States)
Lydic, T. (Stanford Univ. CA, United States)
Turneaure, J. P. (Stanford University CA, United States)