This disclosure relates to a high cBN content polycrystalline cubic boron nitride, PCBN, material. The binder matrix material comprises 19 to 50 wt. % chromium, or a compound thereof.

Articles comprising at least a portion of an earth-boring tool include at least one insert and a solidified eutectic or near-eutectic composition including a metal phase and a hard material phase. Other articles include a solidified eutectic or near-eutectic composition including a metal phase, a hard material phase and a coating material in contact with the solidified eutectic or near-eutectic composition.

The present disclosure relates to a wear part made in a foundry. The wear part has a reinforced portion comprising a ferrous alloy reinforced with metal carbides, nitrides, borides, or intermetallic alloys. The reinforced portion includes inserts of metal carbides, nitrides, metal, or intermetallic compounds manufactured beforehand with a defined geometry and inserted into an infiltrable structure of agglomerated grains including the reagents needed for the formation of metal or intermetallic carbides, nitrides, borides according to an in situ self-propagating thermal reaction initiated during the casting of the ferrous alloy.

This disclosure relates to a high cBN content polycrystalline cubic boron nitride, PCBN, material. The binder matrix material comprises 2 to 15 wt. % titanium diboride (TiB2).

The present disclosure provides a TiCB—Al seed alloy, a manufacturing method thereof and a heritable aluminum alloy. The TiCB—Al seed alloy includes an Al matrix and TiC.sub.B@TiBC seed crystals dispersed on the Al matrix, wherein the TiC.sub.B@TiBC seed crystal comprises a core part and a shell part, the core part contains B-doped TiC.sub.B, and the shell part covers at least a part of the core part and contains a TiBC ternary phase, wherein the B-doped TiC.sub.B refers to a TiC.sub.B phase formed by B atoms occupying C vacancies in a TiC.sub.x crystal, and the TiBC ternary phase refers to a ternary phase composed of Ti, B and C, wherein x<1.

In a sliding member, fatigue resistance of a surface layer formed by dispersing a hard material in a soft metal matrix is improved. A sliding member includes a base material layer and a surface layer, the surface layer includes a metal matrix and a hard material harder than the matrix and dispersed in the matrix, the hard material has a gradient in hardness, and the gradient in hardness gradually decreases from an inner side to a surface of the hard material.

The present invention relates to the composition and production of an engineered degradable metal matrix composite that is useful in constructing temporary systems requiring wear resistance, high hardness, and/or high resistance to deformation in water-bearing applications such as, but not limited to, oil and gas completion operations.

The present invention relates to an aluminum matrix composite (AMC), and particularly to a method and apparatus for preparing an AMC with a high strength, a high toughness, and a high neutron absorption. The present invention combines a high-neutron-absorption and highly stable micro-B.sub.4C extrinsic reinforcement with an in-situ nano-reinforcement containing elements B, Cd, and Hf and having high neutron capture ability, achieves efficient absorption of neutrons by using the large cross-sectional area of the micro-reinforcement, achieves effective capture of rays penetrating gaps of the micro-reinforcement by means of the highly dispersed in-situ nano-reinforcement, and significantly improves the toughness of the composite material by means of the high-dispersion toughening effect of the nano-reinforcement, obtaining a particle-reinforced aluminum matrix composite (PAMC) having high toughness and high neutron absorption.

The present disclosure relates to a hierarchical wear part including a reinforced portion comprising zirconia or an alumina-zirconia alloy. The reinforced portion also includes centimetric inserts with a predefined geometry. The inserts include micrometric particles of metal carbides, nitrides, borides, or intermetallic compounds bonded by a first metal matrix. The inserts are inserted into a reinforcement structure infiltrated by a second metal matrix, the reinforcement structure having a periodic alternation of millimetric areas of high and low concentration of micrometric particles of zirconia or alumina-zirconia alloy. The second metal matrix is different from the first metal matrix.

The present disclosure provides a metal-ceramic composite structure and a fabrication method thereof. The metal-ceramic composite structure includes a ceramic substrate having a groove on a surface thereof; a metal member filled in the groove, including a main body made of zirconium base alloy, and a reinforcing material dispersed in the main body and selected from at least one of W, Mo, Ni, Cr, stainless steel, WC, TiC, SiC, ZrC, ZrO.sub.2, BN, Si.sub.3N.sub.4, TiN and Al.sub.2O.sub.3; a luminance value L of the metal member surface is in a range of 36.92-44.07 under a LAB Chroma system.