Deposition of Undercooled Liquid Ceramics
Abstract
The objective of the research is to show that ceramic particles can be melted in flight, undercooled in flight, and impacted on a substrate to form a thick film. It is further hypothesized that with adequate process control, deposits of high temperature ceramics can be created on heat sensitive substrates, e.g., hybrid electronic structures. The approach is to flow powders in a gas stream through a region of high photon flux to melt the powders, cool the molten particles by radiation, convection and conduction during free flight, and control phase selection and droplet spreading on a substrate by modeling, in-process diagnostics, and metallographic examination of the deposits. The primary application of this process is for the sealing of hybrid ceramic bio-implantable devices, such as pacemakers. Ceramic pacemakers have communication capabilities, integrated feedthroughs, and are MRI and biologically compatible. There is presently no known biocompatible method for sealing these hybrid devices. Other applications include the formation of thick films at high rates for ceramic superconducting tapes and wires, ceramic superconducting coatings for electromagnetic shielding, thermal barrier coatings on heat sensitive substrates, micro coatings for MEMS components, and ceramic joining.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 24, 2001
- Accession Number
- ADA388261
Entities
People
- Joseph Wehrmeyer
- William Hofmeister
Organizations
- Vanderbilt University