A piston has a piston main body including an aluminum alloy, and a covering layer formed on the outer surface of the piston main body, and the covering layer has a first plating layer including an iron-phosphorous alloy, and a second plating layer including a nickel-phosphorous alloy formed on the first plating layer.

A piston has a piston main body including an aluminum alloy, and a covering layer formed on the outer surface of the piston main body, and the covering layer has a first plating layer including an iron-phosphorous alloy, and a second plating layer including a nickel-phosphorous alloy formed on the first plating layer.

The plunger of the present disclosure includes: a plunger main body section that is made of sapphire, has a pillar shape, and includes a non-penetrating fitting hole extending in a central axis direction from one end portion; a core portion that is inserted into the fitting hole and has a higher thermal conductivity than sapphire; and a joint layer that is interposed between an inner peripheral surface and a bottom surface of the fitting hole of the plunger main body section, and an outer peripheral surface and a tip surface of the core portion, the joint layer being configured to bond the plunger main body section and the core portion. A pump includes the plunger. A liquid analysis device includes the pump.

A sprayed coating for a sliding member of the present invention includes a ferrous alloy containing chromium (Cr). The sprayed coating for the sliding member has the content rate of the chromium of 8 mass % or more, includes a structure that comprises crystal grains contained in the sprayed coating and having an average grain size of 3 μm or less, has a Vickers hardness of 300 Hv or more, and then is excellent at abrasion resistance.

A sprayed coating for a sliding member of the present invention includes a ferrous alloy containing chromium (Cr). The sprayed coating for the sliding member has the content rate of the chromium of 8 mass % or more, includes a structure that comprises crystal grains contained in the sprayed coating and having an average grain size of 3 μm or less, has a Vickers hardness of 300 Hv or more, and then is excellent at abrasion resistance.

An article for high temperature service is presented. The article includes a substrate and a thermal barrier coating disposed on the substrate. The thermal barrier coating includes a plurality of aluminum-based particles dispersed in an inorganic binder, wherein the aluminum-based particles are substantially spaced apart from each other via the inorganic binder such that the thermal barrier coating is substantially electrically and thermally insulating. Method of making the article is also presented.

An abradable coating is formed on a mechanical part from a polymer resin-containing powder deposited over a polymer resin-containing liquid that is substantially free of volatile organic hydrocarbons. The liquid and the powder are then cured together to form an abradable coating. The polymer resin-containing powder may include a first thermosetting resin and a filler having a melting point above a cure temperature of the first thermosetting resin. The interactions of the powder and the liquid result in a durable abradable coating. Because the liquid is substantially free of volatile organic hydrocarbons, overspray may be recovered and used to coat other parts.

The invention relates to a piston (1), comprising a ring carrier (2) and a glass piston (3) for observing processes in a combustion chamber (B) of an internal combustion engine, wherein the glass piston (3) is placed upon the ring carrier (2) and is securely connected thereto in the region of an inner casing surface (8) of the ring carrier (2). In order to avoid overly high heat strain in the glass piston (3), the glass piston (3) is connected to the ring carrier (2) via at least one form-fit connection (20), and preferably via a force-fit connection (30).

The invention relates to a piston (1), comprising a ring carrier (2) and a glass piston (3) for observing processes in a combustion chamber (B) of an internal combustion engine, wherein the glass piston (3) is placed upon the ring carrier (2) and is securely connected thereto in the region of an inner casing surface (8) of the ring carrier (2). In order to avoid overly high heat strain in the glass piston (3), the glass piston (3) is connected to the ring carrier (2) via at least one form-fit connection (20), and preferably via a force-fit connection (30).

An object of the present invention is to, while forming a heat insulating layer on a squish area surface of a top surface of a piston main body, prevent generation of large cracks on the heat insulating layer and suppress damages and peeling of the heat insulating layer. To achieve this object, in the present invention, pressure is applied to a heat insulating layer provided on a top surface of a piston main body, that is, a pressing stress is applied to the heat insulating layer in advance.