Abstract:
A polycrystalline diamond structure comprises a first region and a second region adjacent the first region, the second region being bonded to the first region by intergrowth of diamond grains. The first region comprises a plurality of alternating strata or layers (21), (22), each or one or more strata or layers in the first region having a thickness in the range of around 5 to 300 microns. The polycrystalline diamond (PCD) structure has a diamond content of at most about 95 percent of the volume of the PCD material, a binder content of at least about 5 percent of the volume of the PCD material, and one or more of the layers or strata in the first region comprise and/or the second region comprises diamond grains having a mean diamond grain contiguity of greater than about 60 percent and a standard deviation of less than about 2.2 percent. There is also disclosed a method of making such a polycrystalline diamond structure.
Abstract:
Electric sintering of precursor materials to prepare phosphor ceramics is described herein. The phosphor ceramics are prepared by applying an electric current, such as a pulse electric current, to the precursor compositions. The sintering is carried out under pressure to produce dense phosphor ceramics which may be incorporated into devices such as light-emitting devices, lasers, or used for other purposes.
Abstract:
A panel [1] has a relatively thin support structure [5] with a relatively thick insulation layer [6] adhered to it. The support structure [5] has a support panel [2] which is an aluminium honeycomb core which is faced on its sides with a fibre reinforced plastic sheets [3] and [4]. A layer of metal foil is adhered to the reverse side of the support structure [5]. The insulation layer [6] is protected by a barrier [7] which has low-flame spread characteristics. Gaps between adjacent panels [1] are sealed by using cover strips [10]. Each cover strip [10] is a channel [8] which is filled with insulating material [9].
Abstract:
A method for joining first and second ceramic pieces comprising brazing a continuous layer of joining material between the two pieces. The wetting and flow of the joining material can be controlled by among other factors the selection of the joining material, the joining temperature, the time at temperature and the joining atmosphere. The pieces may be aluminum nitride and the pieces may be brazed with an aluminum alloy under controlled atmosphere. The joint material can be adapted to later withstand both the environments within a process chamber during substrate processing, and the oxygenated atmosphere which may be seen within the shaft of a heater or electrostatic chuck.
Abstract:
본 발명은 고체산화물연료전지 단위셀을 구성하는 연료극 지지체를 테이프캐스팅 공법, 또는 압력식, 또는 방전플라즈마 공법 등에 의해 제조한 연료극 지치체(소결체) 위에 테이프캐스팅 공법으로 제조된 연료극 반응층/전해질층 필름 어셈블리를 접착하는 공정을 통한 고체산화물연료전지의 단위셀 제조방법을 제공한다. 고체산화물연료전지의 단위셀 제조방법은, 연료극 지지체의 가소결체를 형성하는 단계, 연료극 반응층 시트를 제조하는 단계, 전해질층 시트를 제조하는 단계, 상기 연료극 반응층 시트와 상기 전해질층 시트를 적층한 필름 어셈블리를 제조하는 단계, 상기 가소결체에 바인더를 제공하는 단계, 상기 바인더가 제공된 상기 가소결체에 상기 필름 어셈블리를 결합시키는 단계, 상기 가소결체와 상기 필름 어셈블리가 결합된 결합체를 라미네이션하는 단계, 상기 라미네이션이 완료된 결합체를 공소결하는 단계, 상기 공소결이 완료된 소결체에서 전해질층 상에 공기극층을 형성하는 단계 및 소결하는 단계를 포함하여 구성된다.
Abstract:
The invention relates to a multi-layered carbon ceramic brake disk having at least one carrier body, and at least one ventilation layer that comprises ventilation ducts, and optionally, at least one friction layer, made by joining green bodies of at least one individual carrier body, and green bodies of at least one individual ventilation layer, and optionally, green bodies of at least one individual friction layer, which green bodies comprise thermoplastic or thermoset polymeric materials, in their solid or cured states, and by subsequent carbonisation and ceramicisation by infiltration with carbide-forming elements.
Abstract:
Disclosed herein are emissive ceramic materials having a dopant concentration gradient along a thickness of a yttrium aluminum garnet (YAG) region. The dopant concentration gradient may include a maximum dopant concentration, a half-maximum dopant concentration, and a slope at or near the half-maximum dopant concentration. The emissive ceramics may, in some embodiments, exhibit high internal quantum efficiencies (IQE). The emissive ceramics may, in some embodiments, include porous regions. Also disclosed herein are methods of make the emissive ceramic by sintering an assembly having doped and non-doped layers.