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Near NetShape siC Deposition

Why machine components from a solid block of material?

TevTech’s Near Net Shape Deposition Systems provide a cost effective method of mass producing near net shape monolithic parts. Large cost savings are realized by an increased raw material to product conversion ratio, decreased post-deposition part fabrication, decreased CVD process time, and increased product yield.  Materials include:

  • Silicon carbide (TevTech’s U.S. Patent No. 6,231,923)
  • Pyrolytic Boron Nitride
  • Silicon nitride

SYSTEM CAPABILITY

  • Internal Tooling Modules allow for a large number of product sites, flexible product mix, and quick turn around time.

  • Deposition uniformity within +/- 10% is routinely achieved on the substrates to reduce deposition time and part fabrication time.

  • Physical separation of the individual substrate sites limits the propagation of cracks between the substrates to greatly increase ‘as deposited’ yield.

  • System configuration allows for deposition of Near Net Shape parts as well as coatings.
TYPICAL DEPOSITION SYSTEM COMPONENTS
  • Vapor Delivery System and Gas Flow Measurement system.
  • Horizontal or Vertical Vacuum Furnace, Pumping System, Manifolds, and Particulate Filters.
  • Internal Tooling Modules, Hot Zone, and Heating Element.
  • Power Supply and Power Distribution System.
  • Effluent Scrubbing System and Neutralization Station.
  • Cooling Water Flow Manifolds and Safety Interlocks.
  • PLC Based Process Control System, Automation, Touch Screen Operator Interface, Instrumentation, Alarms and Interlocks for Safety, Gas Leak Detection, Process Deviation, and Equipment Protection.

GENERAL DESIGN SPECIFICATIONS


Temperature Range

Up to 1600° C

Pressure Range

1 to 760 Torr

Furnace Type

Horizontal or Vertical, Cold Wall, Stainless Steel, Water Jacket

Process Control

PLC with graphical touch screen interface

Hot Zone Materials

Graphite with Carbon Felt Thermal Insulation

Nominal Deposition Rate

~.002"/hour for bulk, ~.001"/hour for coating

OPTIONAL EQUIPMENT AVAILABLE:

-Cooling Water Recirculation System - Scrubber/Water Treatment System
- Control System Options – Data Acquisition, Communication Bus, Chart Recorder - Utility Vacuum System
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