A method of making high performance friction materials with tailored levels of a ceramic hard phase to achieve optimum thermal conductivity, friction coefficient and wear performance of composite brake materials. In accordance with one method of the invention specific end-use application friction requirements are satisfied by tailoring the level of carbon in a selected carbon/carbon preform, heat treating the carbon/carbon composite preform, thereby affecting thermal conductivity so as to optimi...

A method of forming a film of a coating solution on a substrate includes steps of moving a coating solution discharge member relative to a substrate while a coating solution is being discharged from the coating solution discharge member to the surface of the substrate, and changing a discharge direction of the coating solution to an outer peripheral portion of the substrate to make the amount of application to the outer peripheral portion smaller than that to other portions. This can reduce the ...

A process for providing through plated holes in a substrate by screen printing provides uniformly thick plating of the holes. One side of the substrate is screen plated while being subjected to an underpressure between 10 and 200 gr/cm.sup.2 from a chamber fed by a large volume vacuum vat. When treating the other side of the substrate, vacuum may be increased up to 2.5 times the first underpressure.

The method of forming a carbon layer by vapor phase deposition starts a film deposition process of the carbon layer after a surface to be coated with the carbon layer is heated while adjusting a partial pressure of moisture in a film deposition system of the carbon layer to 5.times.10.sup.-6 Torr or less. This carbon layer forming method by means of a vapor phase deposition technique such as sputtering ensures that a high-quality carbon layer having high adhesion to the lower layer and significa...

A process for impregnating at least one porous part with an impregnant comprises: (a) immersing at least one porous part in a fixed volume of impregnant, (b) measuring at least one parameter indicative of the effective volume of the impregnant as the impregnant impregnates the porous part(s), and (c) interrupting impregnation when the measured parameter(s) indicates a desired level of impregnation is achieved. An apparatus for impregnating porous parts comprises a vessel for holding at least one...

A mobile cellular tumble coater and method is provided to coat articles with materials suitable for coating by vapor deposition under vacuum conditions. The mobile cellular tumble coater comprises multiple mobile part cells disposed on a hollow cylindrical chamber of an inner support base positioned within a coating chamber of a coating apparatus. Each mobile part cell comprises a hollow portion with an outer wall having multiple throughholes large enough to permit vapors of coating material to ...

There is provided a process and its system for fabricating plasma with feedback control on plasma density. This process uses a heterodyne millimeter wave interferometer as a sensor to measure the plasma density in the process container and the plasma density that is needed in the plasma fabricating process, and then provides real-time information of the measurements to a digital control device which makes numerical calculations and then drives the RF power generator to change the RF output power...

A method and an apparatus for manufacturing a reaction bonded silicon carbide by the infiltration of molten metal by using a porous silicon carbide/carbon or carbon preform in which the molten metal is supplied to the carbon preform by capillary action through a pyro-carbon coated dense graphite feeder on which a transfer path of molten metal is defined from a molten metal supplier under an inert atmosphere, and a carbon woven fabric on which the carbon preform is placed transfers continuously t...

According to the present invention there is provided a method of manufacturing a compound body having at least one, partly covering layer on a porous body, whose pore system is evacuate by means of a subpressure which is applied on the porous body by a suction cup or the like and the body is dipped in a slurry of powdery components of the layer. The compound body is densified by sintering or other heat treatment, e.g., post-HIP.

Reaction products of metal halides with organic chalcogenides and dichalcogenides provide single source precursors for metal dichalcogenide coatings. The single source precursors are sublimed at reduced pressure and allowed to contact a substrate maintained at an elevated temperature. The resulting dichalcogenide coatings are smooth, and adherent, and may be utilized in numerous applications, for example, as cathodes for lithium batteries.