A gasket for a combustion chamber is provided. The gasket comprises a plated surface extending across at least a portion of the metal base. In the gasket, at least a portion of the plated surface includes a laser treated section with a first raised surface that protrudes away from the metal base and the laser treated section is arranged in a mid-span that is arranged between two cylinder openings.

Provided is a metal gasket including, expressed in mass %, C: 0.10% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.04% or less (including 0%), S: 0.01% or less (including 0%), Ni: 25.0-60.0%, Cr: 10.0-20.0%, either Mo or W alone, or both Mo+W/2:0.05-5.0%, Al: more than 0.8% to 3.0% or less, Ti: 1.5-4.0%, Nb: 0.05-2.5%, V: 1.0% or less (including 0%), B: 0.001-0.015%, Mg: 0.0005-0.01%, S/Mg: 1.0 or less, N: 0.01% or less (including 0%), and O: 0.005%) or less (including 0%), with the remainder being Fe and unavoidable impurities. The metal gasket has a metal structure in which a precipitate γ′ phase having an average equivalent circle diameter of 25 nm or larger is not present within the austenite base.

A tubing string may include a swellable metal material for providing a seal downhole. The swellable metal material may react with a silica material and a water-based fluid to cause the swellable metal material to swell and form a seal within a flow path defined in part by the tubing string.

A gasket material, in which a crosslinked rubber layer compounding 30 to 200 parts by weight of titanium oxide based on 100 parts by weight of NBR or hydrogenated NBR is formed on a metal plate, improves blister resistance, and thus exhibits an excellent effect of preventing rubber peeling of the gasket in the engine and leading to an improvement of engine malfunction. Further, the use of NBR or hydrogenated NBR results in an advantage of low cost relative to that of fluororubber. Therefore, the gasket material of the present invention is effectively used as a cylinder head gasket.

A device for sealing a space at a juncture between elements of a nacelle, the device being non-flammable by heat, having a predetermined shape, and having a proximal end configured to be inserted into the space to be sealed so as to seal it, and a distal end configured to be fastened to an element of the nacelle at a fire area.

Flexible seal assemblies having a relatively low torsional rigidity and high longitudinal flexure to thereby allow the flexible seal assembly to flex between adjacent components and maintain a seal, even when movement between adjacent components occurs, is described. In some embodiments, the flexible seal assembly includes one or more layers of metal matrix material, the metal matrix material being comprised of a plurality of short segments of thin wire arranged randomly and sintered together to form a semi-rigid sheet. The one or more layers of metal matrix material can be sandwiched between an upper casing and a lower casing of a metal alloy casing. In various embodiments, additional features are provided for helping to make sure the seal assembly stays together, such as spot welds formed through the seal assembly, an S-shaped casing, and a recess/protrusion feature provided on adjacent layers of metal matrix material.

A tribological and creep resistant system configured to operate at temperatures in excess of 700° C. A seal body extends between a leading edge and a trailing edge. A first component contact surface is adjacent the leading edge and a second component contact surface is adjacent the trailing edge. The seal body is formed from a high entropy alloy.

An object is to provide a metal gasket that can form a wide contact width for a counterpart sealing face and that can achieve excellent sealing properties even when a blow hole is generated in the counterpart sealing face, and the object is achieved by a metal gasket having a bead portion to be in contact with a counterpart sealing face to form a sealing portion, formed on a gasket main body. The bead portion includes an arc portion that is convex toward the counterpart sealing face and hem-rising portions that each obliquely rise from the gasket main body toward the arc portion, on both hems of the arc portion. A connection portion between the arc portion and the hem-rising portion is formed to be convex toward a convex side of the bead portion. Plastic distortion for an overall width of the arc portion is lower than that of the connection portion. A contact pressure distribution in the arc portion in a compression state has a shape that is flat and wide in a width direction of the arc portion.

A method includes providing a powdered high entropy alloy and forming the powdered high entropy alloy into a seal body with a heat source. The seal body extends between a leading edge and a trailing edge and includes a first component contact surface adjacent the leading edge and a second component contact surface adjacent the trailing edge. The seal body is operable at temperatures in excess of 700° C.

A pressure-energized bidirectional seal having a main body having a first end and a second end and a pair of legs extending from the second end of the main body, the pair of legs having an inner surface and an outer surface, the inner surface forming a hollow interior opening in a first direction. The bidirectional seal includes at least one rib extending from the outer surfaces and configured to sealingly engage a mating surface of a mating body the at least one rib forming a sealing zone opening in a second direction opposite of the first direction.