1C002

'Splat quenching';

'Melt spinning'; or

'Melt extraction'; 1. 'Vacuum atomisation' is a process to reduce a molten stream of metal to droplets of a diameter of 500 μm or less by the rapid evolution of a dissolved gas upon exposure to a vacuum. 2. 'Gas atomisation' is a process to reduce a molten stream of metal alloy to droplets of 500 μm diameter or less by a high pressure gas stream. 3. 'Rotary atomisation' is a process to reduce a stream or pool of molten metal to droplets to a diameter of 500 μm or less by centrifugal force. 4. 'Splat quenching' is a process to 'solidify rapidly' a molten metal stream impinging upon a chilled block, forming a flake-like product. 5. 'Melt spinning' is a process to 'solidify rapidly' a molten metal stream impinging upon a rotating chilled block, forming a flake, ribbon or rod-like product. 6. 'Comminution' is a process to reduce a material to particles by crushing or grinding. 7. 'Melt extraction' is a process to 'solidify rapidly' and extract a ribbon-like alloy product by the insertion of a short segment of a rotating chilled block into a bath of a molten metal alloy. 8. 'Mechanical alloying' is an alloying process resulting from the bonding, fracturing and rebonding of elemental and master alloy powders by mechanical impact. Non-metallic particles may be incorporated in the alloy by addition of the appropriate powders. 9. 'Plasma atomisation' is a process to reduce a molten stream or solid metal to droplets of 500 μm diameter or less, using plasma torches in an inert gas environment. 10. 'Ultrasonic atomisation' is a process to reduce a molten stream of metal alloy to droplets of 500 μm diameter or less by ultrasonic vibration. 11. For the purposes of 1.C.2. Technical Notes, 'solidify rapidly' is a process involving the solidification of molten material at cooling rates exceeding 1000 K/s.

Nickel aluminides containing a minimum of 15 % by weight aluminium, a maximum of 38 % by weight aluminium and at least one additional alloying element;

Titanium aluminides containing 10 % by weight or more aluminium and at least one additional alloying element;

Nickel alloys having any of the following:

A ‘stress-rupture life’ of 10 000 hours or longer at 923 K (650 °C) at a stress of 676 MPa; or

A ‘low cycle fatigue life’ of 10 000 cycles or more at 823 K (550 °C) at a maximum stress of 1 095 MPa;

Niobium alloys having any of the following:

A ‘stress-rupture life’ of 10 000 hours or longer at 1 073 K (800 °C) at a stress of 400 MPa; or

A ‘low cycle fatigue life’ of 10 000 cycles or more at 973 K (700 °C) at a maximum stress of 700 MPa;

Titanium alloys having any of the following:

A ‘stress-rupture life’ of 10 000 hours or longer at 723 K (450 °C) at a stress of 200 MPa; or

A ‘low cycle fatigue life’ of 10 000 cycles or more at 723 K (450 °C) at a maximum stress of 400 MPa;

Aluminium alloys having any of the following:

A tensile strength of 240 MPa or more at 473 K (200 °C); or

A tensile strength of 415 MPa or more at 298 K (25 °C);

Magnesium alloys having all of the following: a. A tensile strength of 345 MPa or more; and b. A corrosion rate of less than 1 mm/year in 3 % sodium chloride aqueous solution measured in accordance with ASTM standard G-31 or national equivalents;

Alloyed materials having all of the following: 1. Made from any of the composition systems specified in 1C002.c.1.; 2. In the form of uncomminuted flakes, ribbons or thin rods; and 3. Produced in a controlled environment by any of the following: a. ‘Splat quenching’; b. ‘Melt spinning’; or c. ‘Melt extraction’.