Abstract: There is provided a method of manufacturing a window having at least one of a radio wave stealth property and an electromagnetic wave shield property comprising: a step for forming a thin-film composed of a conductive material on the surface of a transparent window member having a curved surface, and a step for forming the thin-film into a mesh shape. As a result, it is, possible to manufacture, at lower cost, a window having a radio wave stealth property that scatters radio waves in various directions so as not to be detected by radar, while transparency to visible light is improved, as well as a window having an electromagnetic wave shield property that effectively prevents harmful electromagnetic waves, except for visible radiation, from invasion into an aircraft.

Abstract: An inexpensive high temperature oxidation resistant material for spacecraft, having a higher heat resistance than a conventional oxidation resistant material of a silicon carbide coating system, which may be readily formed into a desired shape, a hot structure part including the oxidation resistant material for spacecraft, a spacecraft provided with the hot structure part, and a method for producing the oxidation resistant material for spacecraft are provided. The oxidation resistant material for spacecraft includes a ceramic material in which silicon carbide is included in zirconium boride. The method for producing the oxidation resistant material for spacecraft includes the steps of including SiC in zirconium boride, and molding by means of a normal pressure sintering method.

Abstract: An aircraft window of synthetic resin has a hard coated film and either at least a double-pane or single-pane construction, the hard coated film comprises siloxane bonds and/or silazane bonds obtained obtained by coating a coating composition containing perhydropolysilazane or its condensation polymer which is substantially soluble in organic solvent on the surface of the synthetic resin aircraft window and heat-treating at approximately ambient temperature to 100° C. in air or humidified air.

Abstract: A high temperature oxidation resistant coating performs a self-repairing function of self-repairing the cracks under a heated environment and has low catalytic properties. The high temperature oxidation resistant coating is prepared by dispersing silicate particles containing a composite oxide consisting of an oxide of a lanthanoide series rare earth element including yttrium and silicon oxide into a glass-based matrix.

Abstract: An aircraft window of synthetic resin having hard coated film and at least a double-pane construction with a hollow interspace therebetween for an aircraft cabin window or a single pane construction including a mono-layer or multi-layer pane for an aircraft cockpit, canopy, or windshield window comprises an outer synthetic resin molded body having hard coated film on the outside surface of the aircraft and an inner synthetic resin molded body facing each other to form at least a double-pane construction with a hollow interspace therebetween, or an synthetic resin molded body having hard coated film on the outside surface or both of outside and inside of the aircraft to form a single pane construction of mono-layer or multi-layer, the hard coated film comprising siloxane bonds and/or silazane bonds obtained by coating a coating composition containing perhydropolysilazane or its condensation polymer which is substantially soluble in organic solvent on the surface of the synthetic resin molded body and heat-trea

Abstract: A high temperature oxidation resistant coating performs a self-repairing function of self-repairing the cracks under a heated environment and has low catalytic properties. The high temperature oxidation resistant coating is prepared by dispersing silicate particles containing a composite oxide consisting of an oxide of a lanthanoide series rare earth element including yttrium and silicon oxide into a glass-based matrix.

Abstract: An amorphous thin film as a solid lubricant having a low coefficient of friction. It is composed of silicon (Si), oxygen (O), carbon (C), and hydrogen (H), and has a composition defined by the formula: Si.sub.x (O.sub.m, C.sub.n, H.sub.l-m-n).sub.1-x where, x=0.03-0.02, m=0.05-0.5, =0.1-0.9, and 0.6.ltoreq.m+n.ltoreq.0.95. This thin film exhibits extremely low friction stably from the beginning of sliding. It has superior wear resistance owing to its high hardness.

Abstract: A hard and lubricant thin film of amorphous carbon-hydrogen-silicon and a process of producing the same. The thin film comprises carbon and hydrogen as major components, the balance mainly containing a silicon-based material, and it contains diamond-like carbon. The content of hydrogen is from 30 to 50% by atomic and the content of carbon is 70% by atomic or more with respect to the total composition except hydrogen.An iron-based metallic material having the thin film of amorphous carbon-hydrogen-silicon formed thereon and a process for producing the same are also provided. The iron-based matallic material is very hard and has a small coefficient of friction.

Abstract: A process for ion nitriding aluminum material which comprises the steps of placing an object of aluminum or aluminum alloy for treatment in a closed vessel; evacuating residual oxygen gas from said closed vessel; charging said closed vessel with a heating gas and inducing discharges in said closed vessel, thereby heating the surface of the object for treatment to a prescribed nitriding temperature; charging said closed vessel with a surface-roughening gas composed of a rare gas and 5-2000 ppm of a gas containing at least one element of oxygen, nitrogen, and carbon, and roughening the surface of the object for treatment by means of glow discharges or ion beams in the atmosphere of said surface roughening gas; and charging said closed vessel with a nitriding gas and simultaneously inducing glow discharges in said closed vessel, thereby forming a nitride layer on the surface of the object for treatment.