Abstract: Provided are materials for a formed body comprising hexagonal boron nitride and such formed bodies. Also provided are heat-treated formed body obtained by heat-treating the formed bodies. The invention further relates to processes for making the formed body and the heat-treated formed body.

Abstract: Provided are materials for a formed body comprising hexagonal boron nitride and such formed bodies. Also provided are heat-treated formed body obtained by heat-treating the formed bodies. The invention further relates to processes for making the formed body and the heat-treated formed body.

Abstract: The invention relates to a polymer sliding material, capable of running dry and comprising a polymer matrix material and fillers, wherein the fillers comprise reinforcing particles, hard material particles and lubricant particles. The invention furthermore relates to a mechanical seal, comprising a rotating sealing ring and a stationary counter ring, wherein the sealing ring and/or the counter ring encompass the polymer sliding material, which is capable of running dry. Furthermore, the invention relates to the use of such polymer materials, which are capable of running dry, for dry-running applications, especially as a material for displacement elements in wet-running and dry-running pumps.

Abstract: The invention relates to an axial bearing comprising a slide ring (1), a counter-ring (2) and an elastic mounting (3) of the slide ring, wherein the slide ring (1) is integral and has a structuring on the running surface thereof which enables the development of a stable, hydrodynamic lubricating film and wherein the structuring of the running surface occurs so that the running surface has three or more elevations (6), wherein the contact surfaces (8) thereof are even with the counter-ring (2).

Abstract: A process for joining ceramic components, wherein the components which are to be joined consist of sintered nonoxide ceramic, and the components are brought into contact with one another in a diffusion-welding process in the presence of a shielding gas atmosphere and are joined with little deformation, under the application of a temperature of at least 1600° C., preferably over 1800° C., particularly preferably over 2000° C., and if appropriate a load, to form a monolith, the components which are to be joined experiencing plastic deformation in the direction in which force is introduced of less than 5%, preferably less than 1%.

Abstract: A process for joining ceramic components, wherein the components which are to be joined consist of sintered nonoxide ceramic, and the components are brought into contact with one another in a diffusion-welding process in the presence of a shielding gas atmosphere and are joined with little deformation, under the application of a temperature of at least 1600° C., preferably over 1800° C., particularly preferably over 2000° C., and if appropriate a load, to form a monolith, the components which are to be joined experiencing plastic deformation in the direction in which force is introduced of less than 5%, preferably less than 1%.

Abstract: A process for joining ceramic components, wherein the components which are to be joined consist of sintered nonoxide ceramic, and the components are brought into contact with one another in a diffusion-welding process in the presence of a shielding gas atmosphere and are joined with little deformation, under the application of a temperature of at least 1600° C., preferably over 1800° C., particularly preferably over 2000° C., and if appropriate a load, to form a monolith, the components which are to be joined experiencing plastic deformation in the direction in which force is introduced of less than 5%, preferably less than 1%.

Abstract: A ceramic composite includes (a) 30 to 60% by volume of C-fibers; (b) 10 to 55% by volume of a matrix made of SiC and C, wherein the weight ratio SiC:C is in the range of between 20:1 and 2:1; (c) 5 to 40% by volume porosity that may be open or closed. A base material is formed from a)+b)+c).