A blade for creping a paper web from a Yankee cylinder surface is made of a steel substrate having a thickness of 0.7 mm-2 mm. The steel substrate is covered by a cermet coating that forms a working edge adapted for contact with the surface and a web impact area upon which the web impacts during creping. The cermet coating includes chromium carbides and tungsten carbides in a nickel based metal matrix. The cermet coating has a porosity of <2 volume % and a hardness of >1100 HV.sub.0.3.

A blade for creping a paper web from a Yankee cylinder surface is made of a steel substrate having a thickness of 0.7 mm-2 mm. The steel substrate is covered by a cermet coating that forms a working edge adapted for contact with the surface and a web impact area upon which the web impacts during creping. The cermet coating includes chromium carbides and tungsten carbides in a nickel based metal matrix. The cermet coating has a porosity of <2 volume % and a hardness of >1100 HV.sub.0.3.

The present invention relates a coating powder comprising a rare earth oxyfluoride (Ln-O—F) and having: an average particle size (D.sub.50) of 0.1 to 10 μm, a pore volume of pores having a diameter of 10 μm or smaller of 0.1 to 0.5 cm.sup.3/g as measured by mercury intrusion porosimetry, and a ratio of the maximum peak intensity (S0) assigned to a rare earth oxide (Ln.sub.xO.sub.y) in the 2θ angle range of from 20° to 40° to the maximum peak intensity (S1) assigned to the rare earth oxyfluoride (Ln-O—F) in the same range, S0/S1, of 1.0 or smaller in powder X-ray diffractometry using Cu-Kα rays or Cu-Kα.sub.1 rays.

An abradable powder composition is includes a metal component, a lubricant component, and a polymer component. A portion of the metal component is wrapped in the lubricant component to achieve high lubricity and abradability. The abradable powder composition can be used to form an abradable seal coating provided for use in a turbo machinery having a housing and a wheel having multiple blades. The housing houses the wheel which rotates therein. The seal coating is formed on the inner walls of housing adjacent where the wheel blades pass during their rotation. When the wheel is rotated such that the blades contact the seal coating, it is abraded to form a close fit gap. The abradable seal coating preferably does not produce significant wear of the blade tips or transfer abradable material significantly to the blade tips upon being abraded.

An example hydraulic system component of a machine includes a protective coating deposited by high velocity air fuel (HVAF) thermal spray, exhibiting high adhesion strengths and surface morphologies that promote lubricant adhesion and reduce the leakage of oil and/or hydraulic fluid from the hydraulic system. The coating may have surface roughness with Rz values less than 2 μm and hardness of 1000 Vickers or greater. The HVAF coating may be thinner than conventional coatings with thicknesses less than 100 μm. The HVAF coating may be deposited on a variety of steel components with adhesion strengths greater than those achieved by high velocity oxygen fuel (HVOF). The HVAF coating may be formed without time consuming roughening and/or post-grind operations, resulting in cost savings compared to conventional coatings. The coatings may have operational lifetimes of 1000 hours or more.

An example hydraulic system component of a machine includes a protective coating deposited by high velocity air fuel (HVAF) thermal spray, exhibiting high adhesion strengths and surface morphologies that promote lubricant adhesion and reduce the leakage of oil and/or hydraulic fluid from the hydraulic system. The coating may have surface roughness with Rz values less than 2 μm and hardness of 1000 Vickers or greater. The HVAF coating may be thinner than conventional coatings with thicknesses less than 100 μm. The HVAF coating may be deposited on a variety of steel components with adhesion strengths greater than those achieved by high velocity oxygen fuel (HVOF). The HVAF coating may be formed without time consuming roughening and/or post-grind operations, resulting in cost savings compared to conventional coatings. The coatings may have operational lifetimes of 1000 hours or more.

A process for producing a thermal barrier coating having an excellent thermal barrier effect and superior durability to thermal cycling. Also, a turbine member having a thermal barrier coating that has been formed using the production process, and a gas turbine. The process for producing a thermal barrier coating includes: forming a metal bonding layer (12) on a heat-resistant alloy substrate (11), and forming a ceramic layer (13) on the metal bonding layer (12) by thermal spraying of thermal spray particles having a particle size distribution in which the 10% cumulative particle size is not less than 30 μm and not more than 100 μm.

A process for producing a thermal barrier coating having an excellent thermal barrier effect and superior durability to thermal cycling. Also, a turbine member having a thermal barrier coating that has been formed using the production process, and a gas turbine. The process for producing a thermal barrier coating includes: forming a metal bonding layer (12) on a heat-resistant alloy substrate (11), and forming a ceramic layer (13) on the metal bonding layer (12) by thermal spraying of thermal spray particles having a particle size distribution in which the 10% cumulative particle size is not less than 30 μm and not more than 100 μm.

Proposed are a slurry composition for suspension plasma thermal spray, a preparation method therefor, and a suspension plasma thermal spray coating film. When the slurry composition is used to form a thermal spray coating film, the thermal spray coating film can be stably applied to applications used in a corrosive environment because no changes occur in content of oxygen and fluorine in the thermal spray coating film. In addition, when forming the coating film, since various crystal structures can be formed under control, the coating film can be used in various environments requiring corrosion resistance. In addition, the slurry composition can inhibit formation of cracks and pores that frequently occur in existing thermal spray coating films, thereby allowing for formation of a denser thermal spray coating film than the existing thermal spray coating film.

It is an object to provide a method for producing a member for a molten metal bath which is less likely to form minute cracks and pores in a pores-sealing coating film, and to provide a method for producing a member for a molten metal bath which can restrain adhesion of an alloy such as dross. The method for producing a member for a molten metal bath is characterized by applying or spraying, to a cermet thermal spray coating film formed on a base material or an oxide-based ceramic thermal spray coating film formed on a base material, a mixed solution obtained by adding aluminum dihydrogen phosphate and inorganic particles having a layered hexagonal crystal structure to a silica sol solution as a solution for sealing pores of the thermal spray coating film, and firing the mixed solution which is applied or sprayed to the thermal spray coating film.