Consultancy Service
in Chemical Vapour
Name John Yeatman
Position Managing Director at Archer Technicoat Ltd
Education University of Oxford

Specialist & consultant in the fields of Chemical Vapour Deposition (CVD) and materials technology. CVD and it's associated process Chemical Vapour Infiltration can be used to make a wide variety of surface coatings and materials with an even wider range of applications.

Fields of Activity:

  • medical
  • electronic
  • semiconductor
  • aerospace
  • automotive
  • nuclear power (fission & fusion)
  • rocketry.

John Yeatman’s Specialties:

Tribological solutions: Corrosion, erosion, oxidation, radiation.
Materials in extreme environments: temperature, pressure, chemical, radiation.
Expert Witness
Coating plant design
Ceramic matrix composites, design, selection & testing

Check out my
LinkedIn page
And my blog

or Contact me now.

Specialised areas

+ chemical vapour depositionHe has over 25 years experience in the field of chemical Vapour deposition. He has designed and built CVD coating systems up to 1.5m diameter & 2m high. He has a particular experience in high temperature (1200 - 2200 degC) CVD processes and design of equipment for these processes. Typical coatings include, pyrolytic graphite, pyrolytic carbon, boron nitride, silicon nitride, aluminium nitride, silicon carbide, boron carbide, tungsten, tungsten carbide, tantalum, tantalum carbide, niobium, iridium, rhenium.

+ chemical vapour deposition precursor materialAs a practitioner or chemical Vapour deposition and organo-metallic chemical Vapour deposition for over 25 years, he has a wide experience in the selection of precursor materials for chemical Vapour deposition: Organo-metallic and inorganic chlorides, fluorides etc.

+ chemical vapour deposition reactorHe has extensive experience of designing and building chemical Vapour deposition reactors from laboratory size up to very large industrial machines. He has designed and developed new types of reactor for CVD, CVI, OMCVD, HTCVD (1200degC+).

+ pyrolytic carbonHe has extensive experience of depositing both pyrolytic carbon and pyrolytic graphite coatings. Pyrolytic graphite is a 100% dense very strong material with a very anisotropic structure. It can be deposited in very thick layers which can then be converted into free-standing shapes. This is particularly useful for manufacturing thin walled and/or complicated graphite structures such as tubes, crucibles & cuvettes. Pyrolytic carbon can be deposited directly onto metals such as nickel to provide an impervious chemical barrier whilst still being electrically conducting. This is potentially highly useful in fuel cell and electronic applications.

+ tungsten hexafluorideHe has extensive first-hand experience in the handling of tungsten hexafluoride and other toxic metal fluorides. He has used tungsten hexafluoride as a CVD precursor for producing tungsten layers. Besides its semiconductor uses CVD tungsten has many other uses. It can be deposited in very thick layers of up to several millimeters. This can be utilized to make free standing shapes of tungsten for which there are many applications such as satellite/rocket thrusters, crucibles, thermo-wells, heating elements, projectiles etc.

+ chemical vapour infiltrationHe has over 25 years experience in the field of chemical Vapour deposition. He has designed and built CVI systems up to 1.5m diameter & 2m high. He has extensive experience in the production of ceramic matrix composites (CMCs) from 2D, 2.5D & 3D Carbon & Nicalon fabrics and matrix/interlayer materials C, SiC, BN, SidopedBN. He has also recently done some interesting work on the CVI of tungsten to produce a W/W MMC.

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