摘要:
The invention relates to core used in a mould for casting metal workpieces or molding by injection plastic workpieces for keeping free hollow spaces arranged in the workpieces when the moulds are filled with material.
摘要:
The invention relates to a method of producing a flat slide valve with incorporation of at least one inlet disk in a housing or in at least one element of a housing, wherein the inlet disk is joined to the housing or to at least one element of the housing by forcelocking, formlocking and/or bonding. The invention further provides a flat slide valve having at least one sealing disk, in which at least one of the sealing disks is incorporated into an element of the flat slide valve.
摘要:
A method for increasing the wear-resistance of a work piece involves connecting the work piece to a non-formable core material having a greater hardness than that of the work piece material. In order to improve the connection while simultaneously reducing the costs, the core material is connected in a form-fitting manner to the work piece by means of cold extrusion or hot extrusion of the work piece material.
摘要:
In order to extend the life and reduce the fitting complexity involved, what is proposed is: the light-emitting unit comprises a plurality of individual identical cooling apparatus/light-emitting means modules (3), which are connected for form clusters (5), wherein each cooling apparatus/light-emitting means module (3) comprises a ceramic carrier body (1), which has, on one or more of its surfaces, sintered metallization regions (7), said metallization regions (9) forming a printed circuit board, to which one or more LEDs (2) is/are electrically conductively connected.
摘要:
The invention relates to cast parts which contain at least 87 wt. % silicon nitride and up to 13 wt. % of an additive combination comprised of Al2O3 and Y2O3. The initial composition of the mass formulation starts with Y2O3/Al2O3 ratios of less than 1.1, preferably with Y2O3 Al2O3 ratios of 0.2 to 1.09. 1% to 20% of the Y2O3 portion can thus be substituted by an additional element of the group IVb of the periodic table or by the oxide thereof. The cast parts can comprise up to 1.0 wt. % HfO2 and/or ZrO2. Said cast parts preferably have a thickness >98% of the theoretic thickness. At room temperature, the bending strength of the inventive cast parts amounts to ≧1100 MPa and amounts to ≧850 MPa at 1000° C. The inventive cast parts correspond to the formula Si6-zAlzOzN8-z. The degree of substitution z thus amounts to 0.20 to 0.60, preferably from 0.22 to 0.54, especially from 0.3 to 0.35.
摘要翻译:本发明涉及含有至少87重量% %的氮化硅和高达13wt。 由Al 2 O 3 3 Y 3和Y 2 O 3 3组成的添加剂组合的%。 质量配方的初始组成开始于Y 2 O 3 / N 2 O 3 O 3比率小于 1.1,优选为0.2〜1.09的Y 2 O 3 3 O 3 O 3比率。 1%至20%的Y 2 O 3 O 3部分可以被周期表IVb族的另外的元素或其氧化物所取代。 铸件可以包含至多1.0重量% %HfO 2 2和/或ZrO 2 2。 所述铸造件优选具有理论厚度的> 98%的厚度。 在室温下,本发明铸造件的弯曲强度达到> = 1100MPa,并且在1000℃下达到> = 850MPa。本发明的铸造件对应于式Si 6-z Al z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z z 因此,取代度z为0.20〜0.60,优选为0.22〜0.54,特别优选为0.3〜0.35。
摘要:
The invention relates to a composite body in which a ceramic component and a metal component are bonded to one another by internal soldering. The internal soldering is effected with soldering composition in a recess (2) within a component (1) of the one material in which there is arranged a component (3) of the other material which is shaped to fit accurately. The recess (2) is, at at least one end-face opening, surrounded by a chamfer (5) having an angle .phi. smaller than 35.degree. C., while the wetting angle .beta. between the soldering composition and the plane of the component surface in which the recess is located is smaller than 40.degree..
摘要:
A process is described for electrolessly depositing or electrodepositing a solder layer composed of copper and silver and having an overall composition of silver/copper of from 75:25 to 70:30 and a total layer thickness of 15 to 100 .mu.m on a metallized ceramic. In this process, copper layers and silver layers are deposited alternately on the metallized ceramic. The number of layers is at least 3 and the individual layer thickness is 5 to 10 .mu.m.
摘要:
A method for joining a ceramic component to a metal component by brazing where the outer edge of the joining surface on the ceramic component (1) is provided with a chamfer (3) with a chamfer angle (.alpha.) of 15.degree.-45.degree.. The chamfer (3) has an edge radius of .ltoreq.0.3 mm and its minimum height (H) is to be 5-30% of the wall thickness (W) of the ceramic component (1). The joining surface, including its chamfer, is provided with a metallizing layer.
摘要:
A surge voltage protector having a tubular ceramic part as an insulator, and having metal electrodes soldered onto the end faces thereof. Each electrode is electrically connected in each case to an ignition aid applied at least to the inside wall of the ceramic part. The inside edges of the surfaces joining the ceramic part to the electrodes are each provided with a chamfer whose chamfer angle is 15.degree. to 60.degree. relative to the plane of the joining surfaces. The width projected onto the plane of the joining surface is 0.05 to 0.4 mm.