1988 Ed.]
Import and Export (Strategic Commodities) Regulations
[CAP. 60
G 39
[Subsidiary]
1. Coating processo
2. Substrate
H. "Ion Im-plantation"
Footnotes:
Corrosion resistant steels(7)
Titanium or Titanium alloys Carbon-carbon, Carbon-ceramic or Metal matrix composites
Copper or Copper alloys Silicon carbide or Cemented tungsten carbide
High temperature bearing steels
Beryllium or Beryllium alloys Carbon-carbon, Carbon-ceramic or Metal matrix composites
Titanium or Titanium alloys Silicon nitride or Cemented tungsten carbide
Sensor window materials transparent to electromagnetic waves, as follows-silica, alumina, silicon, germanium, zinc sulphide, zinc selenide or gallium arsenide
3. Resultant coating
MCrAIX (except CoCrAIY which contains less than 22 weight per cent of chromium and less than 12 weight per cent of aluminium and less than 2 weight per cent of yttrium)(5), Modified zirconia (except calcia-stabilized zirconia) or Mixtures thereof(4)
Borides or Nitrides
Silicides, Carbides, Mixtures thereof(4) or Dielectric layers
Tungsten or Dielectric layers Carbides, Tungsten or Dielectric layers
Additions of Chromium, Tantalum or Niobium (Columbium)
Borides
Silicides, Carbides, Mixtures thereof(4) or Dielectric layers
Borides or Nitrides
Nitrides, Carbides or Dielectric layers
Dielectric layers
(1) Coating process includes coating repair and refurbishing as well as original coating.
(2) Multiple-stage coatings in which an element or elements are deposited prior to application of the aluminide coating, even if these elements are deposited by another coating process, are included in the term “alloyed aluminide” coating, but the multiple use of single stage "pack cementation" processes to achieve alloyed aluminides is not included in the term "alloyed aluminide" coating.
(3) Multiple-stage coatings in which the noble metal or noble metals are laid down by some other coating process prior to application of the aluminide coating are included in the term "noble metal modified aluminide" coating.
(4) Mixtures consist of infiltrated material, graded compositions, co-deposits and multilayer deposits and are obtained by one or more of the coating processes specified in this table.
(5) MCrAIX refers to an alloy where M equals cobalt, iron, nickel or combinations thereof and X equals hafnium, yttrium, silicon or other minor additions in various proportions and combinations.
(6) Aluminium alloys as a substrate in this Table refers to alloys usable at temperatures above 500K (227°C).
(7) Corrosion resistant steel refers to AISI (American Iron and Steel Institute) 300 series or equivalent national standard steels.
(8) Refractory metals as a substrate in this Table consist of the following metals and their alloys: niobium (columbium), molybdenum, tungsten and tantalum.
(9) This Item does not embargo technology for single-stage "pack cementation” of solid airfoils.
1988 Ed.]
Import and Export (Strategic Commodities) Regulations
[CAP. 60
G 39
[Subsidiary]
1.
Coating
processo
2. Substrate
H. "Ion Im-
plantation"
Footnotes:
Corrosion resistant steels(7)
Titanium or Titanium alloys Carbon-carbon, Carbon- ceramic or Metal matrix composites
Copper or Copper alloys Silicon carbide or Cemented tungsten carbide
High temperature bearing steels
Beryllium or Beryllium alloys Carbon-carbon, Carbon- ceramic or MetalЛnatrix composites
Titanium or Tifanium alloys Silicon nitridefor Cemented
tungsten carbide
Sensor window materials
transparent to electromagnetic
waves, as follows-silica,
alumina, filicon, germanium, zinc sulphide, zinc selenide or gallium arsenide
3.
Resultant coating
MCrAIX (except CoCrAIY which contains less than
22 weight per cent of chromium and less than 12 weight per cent of aluminium and less than 2 weight per cent of yttrium)(5), Modified zirconia (except calcia- stabilized zirconia) or Mixtures thereof (4)
Borides or Nitrides
Silicides, Carbides, Mixtures thereof(4) or Dielectric layers
Tungsten or Dielectric layers Carbides,
Tungsten or Dielectric layers
Additions of Chromium, Tantalum or Niobium (Columbium)
Borides
Silicides, Carbides, Mixtures thereof(4) or Dielectric layers
Borides or Nitrides
Nitrides, Carbides or Dielectric layers
Dielectric layers
(1) Coating proess includes coating repair and refurbishing as well as original coating. (2) Multiple-stage coatings in which an element or elements are deposited prior to application of the /aluminide coating, even if these elements are deposited by another coating process, are included in the term “alloyed aluminide” coating, but the multiple use of single stage "pack cementation" processes to achieve alloyed aluminides is not included in the term "alloyed aluminide" coating.
(3) Multiple-stage foatings in which the noble metal or noble metals are laid down by some other coating process prior to application of the aluminide coating are included in the term "noble metal modified aluminide" coating.
the
(4) Mixtures consist of infiltrated material, graded compositions, co-deposits and multilayer deposits and are obtained by one or more of the coating processes specified in this table.
(5) MCrAIX refers to an alloy where M equals cobalt, iron, nickel or combinations thereof and X equals hafnium, yttrium, silicon or other minor additons in various proportions and combinations.
(6) Aluminium alloys as a substrate in this Table refers to alloys usable at temperatures
above 500K (227°C).
(7) Corrosion resistant steel refers to AISI (American Iron and Steel Institute) 300
scries or equivalent national standard steels.
(8) Refractory metals as a substrate in this Table consist of the following metals and
their alloys: niobium (columbium), molybdenum, tungsten and tantalum.
(9) This Item does not embargo technology for single-stage "pack cementation” of
solid airfoils.
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