Abstract:
The present invention relates to an enhanced ceramic coating, ECC, composition comprising a non-stick ceramic coating composition, CCC, and 0.2 wt% - 2 wt % diamond additive, DA with wt% compared with the total weight compared to the ECC composition. It also relates to a method of coating an artefact with the ECC, and an artefact provided 5 with a dry film coating containing an ECC prepared using an ECC composition of the invention. An artefact coated with the ECC has the combined advantages of durable non- stick, scratch resistance and abrasion resistance.
Abstract:
A composition having nanoparticles of a refractory-metal carbide or refractory-metal nitride and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising a metal component and an organic component. The metal component is nanoparticles or particles of a refractory metal or a refractory-metal compound capable of decomposing into refractory metal nanoparticles. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining particles of a refractory metal or a refractory-metal compound capable of reacting or decomposing into refractory-metal nanoparticles with an organic compound having a char yield of at least 60% by weight to form a precursor mixture.
Abstract:
Die Erfindung betrifft einen faserverstärkten Verbundkörper mit einer ersten Zone aus einer keramischen Matrix, die überwiegend Siliciumcarbid und gegebenenfalls Silicium und/oder Kohlenstoff und/oder deren Verbindungen enthält, einer zweiten Zone, die auf einer Oberfläche der keramischen Matrixzone angeordnet und aus einer faserverstärkten C/SiC-Keramik gebildet ist, wobei die Faserlänge von der Aussenseite der faserverstärkten Keramikzone zur ersten Zone hin abnimmt und gegebenenfalls einer oder mehreren weiteren Zonen, die auf der zweiten Zone angeordnet sind. Die Erfindung beschreibt ebenfalls ein Verfahren zur Herstellung dieses Verbundkörpers, das durch gemeinsames Infiltrieren zumindest der ersten und der zweiten Zone mit flüssigem Silicium und Durchführung einer Silicierung gekennzeichnet ist. Ein solcher Verbundkörper kann insbesondere als Panzerung im zivilen oder auch im militärischen Bereich eingesetzt werden.
Abstract:
Ceramic compositions which are of particular value in the handling or casting of steel, for example as lining materials or for producing nozzles or shrouds used in continuous casting, comprise a mixture of particles of boron nitride, zirconium diboride and at least one other refractory material, bonded together by carbon produced by the decomposition of an organic binder such as a resin or pitch. The other refractory material may be for example a refractory metal, an oxide, a carbide, a boride or a nitride. Zirconium oxide containing compositions comprising 5-70 % by weight boron nitride, 5-60 % by weight zirconium diboride and 5-80 % by weight of zirconium oxide are particularly suitable for forming at least that part of a nozzle which in use is at the slag line in a molten steel vessel. Aluminium oxide containing compositions comprising 5-70 % by weight boron nitride, 15-50 % by weight zirconium diboride and 10-70 % by weight aluminium oxide are particularly suitable for forming the inside of nozzles as they resist alumina build up and prevent clogging of the nozzles.
Abstract:
Substantially dry, self-hardening, thermally activated refractory compositions, suitable for use to produce linings for furnaces or metallurgical vessels such as ladles, tundishes or launders, comprise particulate refractory material, an inorganic binder having associated therewith chemically or physically bound water such as sodium metasilicate pentahydrate or tribasic sodium phosphate dodecahydrate, and an element or compound, such as aluminium, which will react exothermically with the inorganic binder. The compositions may also contain an inhibitor such as a mineral oil or a vegetable oil to inhibit premature exothermic reaction.
Abstract:
A composition having nanoparticles of a refractory-metal carbide or refractory-metal nitride and a carbonaceous matrix. The composition is not in the form of a powder. A composition comprising a metal component and an organic component. The metal component is nanoparticles or particles of a refractory metal or a refractory-metal compound capable of decomposing into refractory metal nanoparticles. The organic component is an organic compound having a char yield of at least 60% by weight or a thermoset made from the organic compound. A method of combining particles of a refractory metal or a refractory-metal compound capable of reacting or decomposing into refractory-metal nanoparticles with an organic compound having a char yield of at least 60% by weight to form a precursor mixture.
Abstract:
The invention relates to a ceramic sintered body, based on SiC and with a density > 95 %, which is particularly suitable for magnetically-relevant applications, such as, for example, hard disc memory substrates or read/write heads. The above is characterised in having a saturation magnetisation of Ms and is prepared by one of the following methods: a) pressureless solid sintering with sintering adjuncts based on Al/C, B/C or Al/B/C with or without a subsequent treatment by hot isostatic pressing, b) pressurised solid sintering with sintering adjuncts based on B/C or Al/B/C, or c) liquid phase sintering with sintering adjuncts based on rare earths (in particular Y2O3) plus Al203 and/or AlN.
Abstract translation:碳化硅具有> 95%的密度的头,在此基础上的陶瓷烧结体特别适用于磁性相关的应用程序,诸如硬盘存储器衬底,或随机接入,其特征在于它具有饱和磁化Ms <1.2 MEMU /厘米<3> 一)无压力的固体实习用Al / C,硼/碳或铝/硼/碳,基础具有或不具有通过热等静压b A后处理上的烧结助剂)的压力影响的固体实习生基于硼的烧结助剂/的:拥有并通过下列任一方法制备的 碳或铝/硼/碳c)中的液相烧结稀土的的基础上,烧结助剂(尤其是Y 2 O 3)加Al 2 O 3和/或AlN。
Abstract:
A low thermal expansion ceramic which comprises at least one selected from the group consisting of cordierite, spodumene and eucryptite in an amount of 60 vol % to 99.9 vol % and at least one selected from the group consisting of carbides, nitrides and borides of 4a Group elements, 5a Group elements and 6a Group elements and boron carbide in an amount of 0.1 vol % to 40 vol %, and has a porosity of 0.5 % or less and a thermal expansion coefficient at 10 DEG to 40 DEG of 1.5 X 10 / DEG C or less. The above ceramic has high rigidity and good resistance to abrasion together with low thermal expansion.