Abstract:
The present invention relates to a suspension comprising 50-95% by weight of the total suspension (w/w) of at least one metallic material and/or ceramic material and/or polymeric material and/or solid carbon containing material; and at least 5% by weight of the total suspension of one or more fatty acids or derivatives thereof. In addition, the invention relates to uses of such suspension in 3D printing processes.
Abstract:
A base plate containing a having a top and a bottom and comprising a beryllium oxide composition containing at least 95 wt % beryllium oxide and optionally fluorine/fluoride ion. The base plate demonstrates a clamping pressure of at least 133 kPa at a temperature of at least 600° C. and a bulk resistivity greater than 1×105 ohm-m at 800° C.
Abstract:
A method of making a composite sheet, a method of making composite component and a composite component are provided. The method of making a composite sheet includes providing a container, adding a binder to the container, adding a plurality of randomly oriented fibers to the binder in the container, and subjecting the container to motion to coat the plurality of randomly oriented fibers with the binder. The method includes curing the binder and coated plurality of randomly oriented fibers to form a composite sheet. The plurality of randomly oriented fibers of the composite sheet are interlocked within the binder. The composite has uniform strength in all planar directions.
Abstract:
A monolithic self-constrained green body tape for use in low temperature ceramic co-firing is provided. The tape contains at least two layers: one low temperature ceramic layer containing particles of a glass, a ceramic, and an organic binder, and a self-constraining layer containing a refractory ceramic and a wetting agent for the glass in the first layer. When the tape is fired at a sintering temperature of the low temperature ceramic layer, densification occurs in the z (thickness) direction, but essentially no shrinkage (less than about 1%) occurs in the x-y planes. A method for forming a multilayer green body tape using simultaneous wet on wet ceramic slurry deposition is also provided. A dense, monolithic, low temperature, co-fired, self-constrained, multicomponent structure is also provided. The structure contains at least two multilayer ceramic substrates having electronic circuit components mounted thereon or therein. Each multilayer ceramic substrate contains at least two layers with one being a self-constraining layer.
Abstract:
The object of the present invention is to provide an aluminum nitride sintered body which has excellent mechanical strength and in which ceramic particles is prevented from coming off from the surface and/or side thereof and generation of free particles is suppressed. The aluminum nitride sintered body of the present invention is wherein it contains sulfur.
Abstract:
A fiber-reinforced ceramic-matrix composite material exhibiting high tensile strength, high fracture toughness and high-temperature oxidation resistance is produced by alternatively depositing multiple thin layers of ceramic material separated by very thin intermediate layers of fugitive carbon onto the fiber reinforcement prior to the subsequent densification with the ceramic matrix. The energy behind propagating matrix cracks in the resulting composite material are effectively dissipated by the progressive increase in crack deflection/branching and frictional slip through the successive ceramic layers of the multilayer fiber coating system. These energy release and arrest mechanisms sufficiently impede the driving force behind unstable crack propagation and render the cracks non-critical, thereby serving to blunt and/or divert propagating matrix cracks at or around the reinforcing fiber. While significantly increasing the strength and fracture toughness of the composite, the multilayer refractory fiber coating system enables the composite to remain oxidatively stable when stressed at or beyond the matrix cracking stress point and subsequently exposed to temperatures above 800.degree. C. in air.