This heat-resistant sintered material has, as an overall composition, a composition including, in terms of % by mass, Cr: 15% to 30%, Ni: 8% to 30%, Si: 2.0% to 6.0%, and C: 0.5% to 2.5% with a remainder being Fe and inevitable impurities, wherein the heat-resistant sintered material has a structure in which hard phases are dispersed in a matrix, the matrix includes Fe, Cr, Ni, and Si, the hard phase includes Fe, Cr, and C, and a porosity is 2.0% or less.

A porous titanium-based sintered body, having a porosity of 45% to 65%, an average pore diameter of 5 μm to 15 μm, and a bending strength of 100 MPa or more. According to the present invention, a porous titanium-based sintered body having good pore diameter and porosity that are compatible with each other and having a high strength can be provided.

A porous titanium-based sintered body, having a porosity of 45% to 65%, an average pore diameter of 5 μm to 15 μm, and a bending strength of 100 MPa or more. According to the present invention, a porous titanium-based sintered body having good pore diameter and porosity that are compatible with each other and having a high strength can be provided.

The invention relates to a method for producing a metal-foam body, comprising the steps of (a) providing a metal-foam body A, which consists of nickel, cobalt, copper, or alloys or combinations thereof, (b) applying an aluminum-containing material MP to metal-foam body A so as to obtain metal-foam body AX, (c) thermally treating of metal-foam body AX, with the exclusion of oxygen, to achieve the formation of an alloy between the metallic components of metal-foam body A and the aluminum-containing material MP so as to obtain metal-foam body B, wherein the duration of the thermal treatment is chosen in dependence on the temperature of the thermal treatment and the temperature of the thermal treatment is chosen in dependence on the thickness of the metal-foam body AX. The invention also relates to the metal-foam bodies obtainable by the methods according to the invention and to the use thereof as catalysts for chemical transformations.

An open-pored metal body, which is formed having a core layer (A) consisting of Ni, Co, Fe, Cu, Ag or an alloy formed having one of said chemical elements, wherein one of said chemical elements is present in the alloy at more than 25 at %, and a gradated layer (B) is formed on surfaces of the core layer (A), said gradated layer being formed by intermetallic phase or mixed crystals of Al, and a layer (C), which is formed having aluminum oxide, is formed on the gradated layer (B).

A porous metal foil and porous metal wire are described. Capacitor anodes made from either or both of the porous metal foil and porous metal wire are further described as well as methods to make same.

A metal contact of a residential circuit breaker with ordered ceramic microparticles is provided. The metal contact comprises an electrical contact material comprising a metal alloy and ceramic particles to form a metal matrix composite material. Both materials the metal alloy and the ceramic particles are present together as a metal compound but without forming an alloy. The metal compound is a matrix and reinforcement being the ceramic particles such that first the ceramic particles has a sintering step to get a homogeneous preform for the metal compound being porous with a controlled size obtained by pressing a particle size of about few micrometers of the ceramic particles and then a liquid metal infiltration step to provide a homogenous distribution of the metal alloy and the ceramic particles in a three-dimensional open porous arrangement and the homogenous distribution results in ordered microstructures.

A titanium product includes an inner layer portion and a surface layer portion joined to the inner layer portion. The surface layer portion has a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: 0.020% or less, the balance: Ti and impurities. The inner layer portion 3 has pores and a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: more than 0.020% and 0.60%, the balance: Ti and impurities. The area fraction of the pores in the inner layer portion in a cross-section perpendicular to the longitudinal direction of the titanium product is more than 0% and not more than 30%. The Cl content (Cl.sub.I) of the inner layer portion, a thickness (t.sub.S) of the surface layer portion, and a thickness (t.sub.I) of the inner layer portion satisfy the expression [Cl.sub.I≤0.03+0.02×t.sub.S/t.sub.I].

A titanium product includes an inner layer portion and a surface layer portion joined to the inner layer portion. The surface layer portion has a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: 0.020% or less, the balance: Ti and impurities. The inner layer portion 3 has pores and a composition consisting of, by mass %, O: 0.4% or less, Fe: 0.5% or less, Cl: more than 0.020% and 0.60%, the balance: Ti and impurities. The area fraction of the pores in the inner layer portion in a cross-section perpendicular to the longitudinal direction of the titanium product is more than 0% and not more than 30%. The Cl content (Cl.sub.I) of the inner layer portion, a thickness (t.sub.S) of the surface layer portion, and a thickness (t.sub.I) of the inner layer portion satisfy the expression [Cl.sub.I≤0.03+0.02×t.sub.S/t.sub.I].

The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.