A liner (18) for a shaped-charge (10) that is compressively formed from a mixture of powdered metal, powdered metal binder, and a selected quantity of nanoparticle material, is used to achieve improved penetration depths during perforation of a wellbore. Exemplary nanoparticles include lead, tin, copper, molybdenum, etc. Such nanoparticles increase the density, sound speed, or acoustic impedance of the liner. In another embodiment, the added nanoparticles comprise reactive materials which, after penetration into the formation, cause secondary reactions in the perforations.

In various embodiments, three-dimensional layered metallic parts are substantially free of gaps between successive layers, are substantially free of cracks, and have densities no less than 97% of the theoretical density of the metallic material.

A process for producing a glass melting component composed of refractory metal. A surface zone of the glass melting component is densified at least in sections by application of local compressive stress. As a result the surface zone has its porosity reduced compared to a volume section which is located underneath the surface zone and which has residual porosity.

In various embodiments, additive manufacturing is utilized to fabricate three-dimensional metallic parts using metallic alloy wire as a feedstock material.

A method for producing a powder-metallurgical product may include providing a powder mixture, forming the powder mixture into a green body, and sintering the green body to form a resulting powder-metallurgical product. The powder mixture may include a first hard phase, a second hard phase, 0 to 1.8% by weight of graphite, 0 to 5% by weight each of cobalt, tri-iron phosphide, copper, bronze, phosphorous, sulphur, calcium fluoride and molybdenum, 0.1 to 1.8% by weight of a pressing aid and a flow improver, and a remaining proportion that is an iron-base powder. The first hard phase may include 52 to 78% by weight of molybdenum, 0 to 2% by weight of silicon, 0 to 1.5% by weight of copper, and a remaining weight proportion of iron and production-related contaminations. The second hard phase may include 0 to 0.8% by weight of manganese and less than 0.1% by weight of carbon.

Molybdenum-containing alloys, and associated systems and methods, are generally described. In certain embodiments, secondary and/or tertiary elements can be included, along with molybdenum, to provide beneficial properties during the sintering of the molybdenum-containing alloy. The molybdenum-containing alloys are, according to certain embodiments, nanocrystalline. According to certain embodiments, the molybdenum-containing alloys have high relative densities. The molybdenum-containing alloys can be relatively stable, according to certain embodiments. Inventive methods for making molybdenum-containing alloys are also described herein.

In various embodiments, metallic alloy powders are formed at least in part by spray drying to form agglomerate particles and/or plasma densification to form composite particles.

A shaped charge liner may include an apex portion and a skirt portion extending from the apex portion. The skirt portion may include a body connected to the apex portion, a perimeter spaced apart from the apex portion, and a carbide layer extending between and spaced apart from the perimeter and the apex portion. A shaped charge for creating a perforation hole in a wellbore casing may include a shaped charge liner having at least one material having hardness that is greater than a corresponding hardness of the wellbore casing. The at least one material is configured to bond to at least one of an outer surface and an inner surface of the perforation hole upon detonation of the shaped charge and penetration of the casing by a perforation jet.

Anodes made from powder, such as tantalum powder, that is highly spherical is described. Methods to make the anodes are further described.

Thermal sprayed coating made from a thermal spray powder material containing aluminum containing particles mechanically alloyed to a transition metal. The coating includes aluminum alloy portions alloyed to the transition metal. The thermal spray powder is made of aluminum containing particles mechanically alloyed to a transition metal.