mac medical overview presentation
DESCRIPTION
Medical Devices Involved in developing while at Morgan CeramicTRANSCRIPT
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Morgan Advanced Ceramics capabilities for the medical
market
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ContentsMAC locationsCeramicsGlass materialsCeramic assembliesBraze alloys/Precious metalsMetal injection moldingCoatings/Surface treatmentsAvailable processes
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Morgan Advanced Ceramicsa division of Morgan Crucible plc
16 manufacturing sites on 3 continents
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Philosophy
MAC combines the resources of our materials, processing, and application engineering to offer effective solutions to solve our customers needs.
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CeramicsAlumina’s – 96%, 99.5%, 99.9%, Vitox biocompatible aluminaAluminum Nitride – 98.5%Zirconia Zirconia toughened aluminaSilicon NitrideCVD Silicon CarbideCVD PBNCVD DiamondMacor
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Glass materials (Preforms and Alumino Silicates)
Glass Preforms allow hermetic seals between ceramic and metal parts.
Glass Preforms – wide range of thermal expansion coefficients available
Hybralox Glass – Alumina loaded glass for stronger sealing
Alumino Silicates are high glass content materials used for low thermal expansion, high thermal shock resistance.
Steatite Lava Cerasil
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Ceramic assembliesCeramic to metal assemblies
Medical grade feedthrus
High power feedthrus
Coatings available
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Diffusion bonding – ceramic to ceramic
Cofiring – Platinum into alumina
Frit bonding – High glass content intermediary layer.
Brazing – Various alloys and ABA’s
Glue - Various epoxy’s
Mechanical - Threading or bolting
Ceramic assemblies - Bonding
Sectioned braze joint
Cross section of diffusion bonded ceramics
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Braze alloys
High purity, low vapor pressure brazing alloys. Precious and non-precious.
Active braze alloys – Do not need an intermediary layer as it directly wets to ceramic.
Braze alloys are typically used to join ceramic to metal assemblies, form electrical paths, and create heaters.
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Metal injection moldingStainless steel: (i.e. 17-4 PH SST, 316L SST, 304L SST, F-15)
Tungsten
Copper
Almost any metal that starts out as a powder can be injection molded
Parylene coating available
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Coatings (for ceramics)Metallizing (moly+nickel, sputter, ABA) – thick or thin film process. Developed for hermetic braze seals, it can also be used to conduct electrical current.
Anti wetting surface treatment – durable as the base material.
Frit or Preforms – high glass content
DLC - diamond like coatings (amorphous carbon) – Contact angles to 110 degrees. Solid lubricant, protective hard coating.
Charge dissipative ceramic – fired into the ceramic surface
Parylene (Insul-Cote P) – vacuum deposited conformal pin-hole free coating. Biocompatible, electrically insulative and low coefficient of friction. Works on many materials.
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Coatings (for MIM parts)Parylene – bulk parts or wire can receive this. Replaces epoxy in many applications. Non porous, conformal, autoclave, biocompatible, and low in friction.
DLC – (diamond like coating) Ion beam or RF plasma process. Transparent, hard, elastic, low friction, chemically inert, electrically insulative.
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Materials Processing (examples)
Ceramics
•Drypressing
•Isopressing
•CIM
•Slip cast
•Extrusion
•CVD
•Grinding
Alloys
•Draw
•Stamp
•Roll
•Melt-spun
Coatings
•CVD
•Spray
•AW surface treat
Metallizing
•Thick film
•Thin film
Brazing
•Vacuum
•Atmosphere
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Alumina ceramic formingIsopressing – High purities. Suitable for volumes of 1 to thousands. Quick turn.
Drypressing – High purities. Suitable for higher volumes in the thousands. Tooling required.
Injection molding – High purities. High volumes. Very complex shapes. Tooling required.
Slip casting – Low purities. Suitable for volumes in 100’s. Tooling required. Inexpensive big parts.
Extrusion – High purities. Low cost. Tube shapes only. Multiple bores possible. Only length can be tight tolerance.
Tape casting – High purities. Low cost. Any volume.