Abstract: The invention relates to an implant for replacing bone or cartilage material, which is constituted by a plurality of elements (B, B1, B2, B3, B4) produced from a non-metallic, linearly elastic material, an element (B, B1, B2, B3, B4) being connected to adjacent elements (B, B1, B2, B3, B4) by a viscoelastic polymer material such that gaps (L) remain between the adjacent elements (B, B1, B2, B3, B4) and that the adjacent elements (B, B1, B2, B3, B4) can move relative to one another.

Abstract: A method for producing a ceramic osseoconductive bone substitute material, the bone substitute material, intervertebral disk implants containing the substitute bone material, and to methods of using the bone substitute material.

Abstract: A ceramic bone replacement material and to a generative method for producing said bone replacement material, in particular ceramic bone replacement materials used in implants and preferably in spinal column implants. Generative manufacturing methods make it possible to shape the structures of the bone replacement.

Abstract: The present invention relates to a bone substitute comprising a core based on hydroxyapatite (HA), obtained from at least one porous wood, or based on collagen fibers and hydroxyapatite, and a shell, based on hydroxyapatite (HA) or silicon carbide (SiC), obtained from at least one wood having a lower porosity than the at least one wood of the core. The porous wood has a total porosity of between 60% and 95%, preferably between 65% and 85%, and it is selected from amongst the choices of rattan, pine, abachi and balsa wood. The wood of the shell has a porosity of between 20% and 60%, preferably between 30% and 50%. The bone substitute is utilized for the substitution and regeneration of bone, preferably for bones subjected to mechanical loads, such as long bones of the leg and arm, preferably the tibia, metatarsus, femur, humerus or radius.

Abstract: A method for producing a ceramic osseoconductive bone substitute material, the bone substitute material, intervertebral disk implants containing the substitute bone material, and to methods of using the bone substitute material.

Abstract: The present invention relates to a bone substitute comprising a core based on hydroxyapatite (HA), obtained from at least one porous wood, or based on collagen fibres and hydroxyapatite, and a shell, based on hydroxyapatite (HA) or silicon carbide (SiC), obtained from at least one wood having a lower porosity than the at least one wood of the core. The porous wood has a total porosity of between 60% and 95%, preferably between 65% and 85%, and it is selected from amongst the choices of rattan, pine, abachi and balsa wood. The wood of the shell has a porosity of between 20% and 60%, preferably between 30% and 50%. The bone substitute is utilized for the substitution and regeneration of bone, preferably for bones subjected to mechanical loads, such as long bones of the leg and arm, preferably the tibia, metatarsus, femur, humerus or radius.

Abstract: Ceramics are made of preceramic paper or board structures in a particular shape previously represented in a paper structure, in which the preceramic papers or boards have a content of ceramic fillers between 30 and 95 wt-%, with the ceramic fillers having a particle size <30 ?m. A method for manufacturing such ceramics and the use thereof are also provided.

Abstract: The invention concerns a process for the production of a porous ?-SiC-bearing ceramic molded body that includes an aluminum oxide layer at the surface of the pores and passages of the porous ?-SiC-bearing ceramic molded body. The invention further concerns a porous ?-SiC-bearing ceramic molded body which has pores of a mean pore size in the range of between 0.1 urn and 50 ?m and an aluminum oxide layer at the surface of the open pores and passages.

Abstract: The invention relates to a process for the production of a molded porous ceramic article containing ?-SiC, which process comprises the following steps: the preparation of a molded article containing silicon and carbon and the subsequent pyrolysis and siliconization of the article containing silicon and carbon to form SiC. The invention further relates to a molded porous ceramic article containing SiC which has been produced from a molded article containing silicon and carbon.

Abstract: The invention concerns a process for the production of a porous ?-SiC-bearing ceramic molded body that includes an aluminum oxide layer at the surface of the pores and passages of the porous ?-SiC-bearing ceramic molded body. The invention further concerns a porous ?-SiC-bearing ceramic molded body which has pores of a mean pore size in the range of between 0.1 urn and 50 ?m and an aluminum oxide layer at the surface of the open pores and passages.

Abstract: Ceramics are made of preceramic paper or board structures in a particular shape previously represented in a paper structure, in which the preceramic papers or boards have a content of ceramic fillers between 30 and 95 wt-%, with the ceramic fillers having a particle size <30 ?m. A method for manufacturing such ceramics and the use thereof are also provided.

Abstract: A sorption rotor has end faces and is rotatably journaled to travel during a revolution through an inflow sector and an outflow sector. The rotor is made of a matrix material having a honeycomb structure with axially throughgoing flow passages. The matrix material is constituted of cellulose paper modified by a ceramic material infiltrated by a sol-gel system or a gel-forming low-viscosity liquid into the matrix.

Abstract: The invention relates to a process for the production of a molded porous ceramic article containing ?-SiC, which process comprises the following steps: the preparation of a molded article containing silicon and carbon and the subsequent pyrolysis and siliconization of the article containing silicon and carbon to form SiC. The invention further relates to a molded porous ceramic article containing SiC which has been produced from a molded article containing silicon and carbon.

Abstract: The invention relates to a sorption rotor (3), which is rotationally mounted, whose face (6, 7) is provided with an inflow sector (6) and an out-flow sector (7), and which passes through said sectors when rotating. The sorption rotor also comprises a material matrix (12) that forms a honeycomb structure with flow channels (15) axially passing through the sorption rotor (3). The aim of the invention is to give the sorption rotor (3) a good thermal stability and strength, a good thermoshock resistance and a high degree of dimensional stability, whereby, at the same time, the sorption rotor should be able to be produced with a comparatively low economical expense. To this end, the invention provides that the material matrix (12) of the sorption rotor (3) is made from cellulose paper and is modified using ceramic materials.

Abstract: Thermal barrier coating systems according to the prior art are exposed to mechanical loads, and in particular ceramic layers tend to form cracks or to flake off on account of their brittleness. A thermal barrier coating system (19) according to the invention includes a second phase (34), which mechanically reinforces the matrix (31) of the layer (25, 28).

Abstract: The invention relates to polymer ceramic composite materials with a virtually zero shrinkage compared to the original model after concluding partial pyrolysis and with a comparable thermal expansion behavior (preferably in an application range of 400° C. or less) to metal construction materials, in particular gray cast iron or steel, which are obtainable by methods described below; corresponding composite constructions and molded parts; and methods for producing and using these materials, composite constructions and molded parts. The polymer ceramic composite materials can for instance be used instead of or in contact with steel or gray cast iron temperature-proof molded parts, predominantly in mechanical engineering, without postmachining after the creative forming.

Abstract: The invention relates to a product (1), particularly a gas turbine blade that can be exposed to a hot aggressive gas (7). The product (1) has a metallic basic body (2), which is provided with a thermal barrier coating (4) having a spinel of the composition AB2O4.

Abstract: A molded part of a ceramic material derived from polymers includes a composite body of a single-phase or multi-phase, amorphous, partially crystalline or crystalline matrix of silicon carbide (SiC), silicon nitride (Si3N4), silicon dioxide (SiO2) or mixtures thereof. The matrix contains graphite inclusions and the density of the ceramic material is at least 85% of the theoretical value. The molded part is produced by subjecting a mixture formed of a polymer component in an amount of 30 to 80 wt. % referred to the total weight of the mixture, fillers in an amount of 0 to 30 wt. % and graphite in an amount of 10 to 70 wt. %, to a forming process with heating to effect crosslinking of the polymer components, followed by a pyrolysis process. In particular, the molded parts are produced from polymers of the group including polysilanes, polysiloxanes, polysilazanes or polycarbosilanes. A process for producing ceramic molded parts and a sliding element having a molded part are also provided.

Abstract: The invention relates to a process for producing a polyceramic composite-material body, wherein a mixture of one or more polymer materials (i), one or more fillers (ii), and a further reactive component (iii), defined below, are subjected to a first temperature treatment to produce a green body and then to a further temperature treatment, at elevated temperatures that for a mixture without component (iii) lead only to partial pyrolysis; wherein the reactive component (iii) is added, in order to react with the structure-forming components of the polymer materials used and/or the reactive gases present, and by that means extensive dimensional constancy at various durations of pyrolysis and various material thicknesses is attained at an instant at which, without the addition of component (iii), dimensional constancy is not yet attained.

Abstract: An article that is particularly well suited for use as a gas turbine engine component has a metallic substrate and a ceramic thermal barrier layer including a mixed metal oxide system comprising a compound selected from the group consisting of (i) a lanthanum aluminate and (ii) a calcium zirconate, the calcium in which is partially replaced by at least one calcium-substitute element, such as strontium (Sr) or barium (Ba). In addition, the lanthanum in the lanthanum aluminate can be partially replaced by a lanthanum-substitute element from the lanthanide group, particularly gadolinium (Gd). A process for producing such an article comprises providing a pre-reacted mixed metal oxide system as described above and applying it to the substrate by plasma spraying or an evaporation coating process.