Suppressors made from intermetallic materials
Disclosed are several examples of apparatuses for suppressing the blast and flash produced as a projectile is expelled by gases from a firearm. In some examples, gases are diverted away from the central chamber to an expansion chamber by baffles. The gases are absorbed by the expansion chamber and desorbed slowly, thus decreasing pressure and increasing residence time of the gases. In other examples, the gases impinge against a plurality of rods before expanding through passages between the rods to decrease the pressure and increase the residence time of the gases. These and other exemplary suppressors are made from an intermetallic material composition for enhanced strength and oxidation resistance at high operational temperatures.
1. An apparatus for suppressing the blast and flash produced as a projectile is expelled by gases from a firearm, the apparatus comprising:
a body made of an intermetallic material composition, said body having a proximal end adjacent to the firearm and an opposite, distal end, said body having a wall with an inner surface that defines a central chamber and an outer surface that defines an inner boundary of a plurality of enclosed gas expansion chambers, the wall also defines a plurality of gas-transfer ports for fluidly connecting the central chamber with the plurality of gas expansion chambers;
a plurality of baffles made of an intermetallic material composition, each of said baffles being disposed within the central chamber of said body and proximate to a gas-transfer port, each of said baffles having a diffuser-shaped surface for diverting the gases from the central chamber to the gas-transfer port and having an airfoil, the airfoil extending from the diffuser-shaped surface by a strut for further diverting the gases from the central chamber to the gas-transfer port;
a can made of an intermetallic material composition, said can being disposed around and spaced apart from said body wall, said can having a wall with an outer surface that is exposed to the ambient atmosphere, and an inner surface that defines an outer boundary of the gas expansion chambers such that the outer surface of said body wall and the inner surface of said can wall cooperate to further define the enclosed gas expansion chambers;
a plurality of ribs made of an intermetallic material composition, each of said ribs extending from said body wall outer surface to said can wall inner surface, the ribs for further defining the gas expansion chambers; and
wherein the gases are directed from the central chamber to the gas expansion chambers via the gas-transfer ports as the projectile moves from the proximal end to the distal end.
2. The apparatus of claim 1 wherein the gases are directed from the gas expansion chambers back through the gas-transfer ports to the central chamber as the projectile further moves from the proximal end to the distal end of said body.
3. The apparatus of claim 1 wherein each of the gas-transfer ports is disposed between two of the ribs.
4. The apparatus of claim 1 wherein at least one of the ribs extends from said body to said can in a direction from the proximal end to the distal end of said body.
5. The apparatus of claim 1 wherein at least one of the ribs extends from said body to said can at a constant distance from each of the proximal and distal ends of said body.
6. The apparatus of claim 1 wherein at least one of the ribs extends between said body and said can at a variable distance from each of the proximal and distal ends in a spiral arrangement.
7. The apparatus of claim 1 wherein the intermetallic material composition is a Ni3Al alloy composition.
8. The apparatus of claim 7 wherein the Ni3Al alloy composition consists essentially of nickel and, in atomic percent, 15.9 aluminum, 8.0 chromium, 0.8 molybdenum, 1.0 zirconium, and 0.04 boron.