摘要:
A coating method for preparing diamond thin film continuously by HFCVD device includes the steps of: (a) carbonizing left and right chamber hot filaments; (b) disposing a substrate on a platform along with a trolley in a sample access chamber under vacuum condition; opening a left chamber gate valve and moving the substrate to left thin film growth chamber; closing the left chamber gate valve to grow diamond thin film on the substrate; (c) repeating step (b) by using a right chamber gate valve and right thin film growth chamber to grow diamond thin film; (d) opening the left chamber gate valve and moving the substrate to the sample access chamber; closing the left chamber gate valve and dropping to room temperature while under vacuum condition; releasing the vacuum condition and taking out the substrate with diamond thin film; (e) repeating step (d) for the right chamber gate valve.
摘要:
Provided is a hot filament CVD device capable of easily attaching, detaching, and replacing a filament. The hot filament CVD device includes a chamber, a base material support that supports multiple base materials, filament cartridges, and paired holding parts. The filament cartridges each include multiple filaments (60), a first frame, a second frame, and paired connecting members. The paired holding parts guide each of the filament cartridges when it is inserted into the chamber, and hold the filament cartridges in the chamber so that the filament cartridges face the multiple base materials.
摘要:
The diamond coated tool of the present invention is a diamond coated tool including a base material and a diamond layer coating a surface of the base material, and characterized in that the surface of the base material has an arithmetic average roughness Ra of not less than 0.1 μm and not more than 10 μm and an average length of roughness profile elements RSm of not less than 3.1 μm and not more than 5.4 μm, and that the diamond layer has a plurality of cavities at a portion bordering on the base material.
摘要:
A machining tool comprising at least one diamond-coated functional region having a substrate surface composed of a hard metal or a ceramic material arranged beneath the diamond layer. The substrate surface contains hard material particles on the basis of carbide and/or nitride and/or oxide, which are embedded in a cobalt-containing binding matrix. The diamond layer is directly arranged on the substrate surface without cobalt having been removed by chemical or physical methods in substantial amounts out of the binding matrix of the substrate surface. Such a tool is produced by pre-treating a hard metal substrate surface with a positively charged ion beam, followed by conventional CVD-diamond coating directly onto the ion beam-pre-treated cobalt-containing substrate surface. The ion-underlying atoms thereby largely remain in the substrate. The tools according to the invention have good diamond layer bonding to the substrate and a high wear resistance.
摘要:
A coated tool is provided which is capable of inhibiting occurrence of chipping, peeling-off, or the like of a diamond layer by enhancing fracture resistance, and which has the diamond layer with high wear resistance. The coating tool is, for example, a drill having a diamond layer coated on a surface of a base material. The diamond layer has a first coating layer located close to the base material, and a second coating layer located on the first coating layer. A mean particle size of second diamond particles constituting the second coating layer is smaller than a mean particle size of first diamond particles constituting the first coating layer. The diamond layer contains hydrogen, and a hydrogen content in the second coating layer is larger than a hydrogen content in the first coating layer.
摘要:
A novel method for fabricating diamond shells is introduced. The fabrication of such shells is a multi-step process, which involves diamond chemical vapor deposition on predetermined mandrels followed by polishing, microfabrication of holes, and removal of the mandrel by an etch process. The resultant shells of the present invention can be configured with a surface roughness at the nanometer level (e.g., on the order of down to about 10 nm RMS) on a mm length scale, and exhibit excellent hardness/strength, and good transparency in the both the infra-red and visible. Specifically, a novel process is disclosed herein, which allows coating of spherical substrates with optical-quality diamond films or nanocrystalline diamond films.
摘要:
The present invention provides a diamond coated tool which is resistant to exfoliation at an interface between a base material and a diamond layer. The diamond coated tool of the present invention is a diamond coated tool including a base material and a diamond layer coating a surface of the base material, and characterized in that the surface of the base material has an arithmetic average roughness Ra of not less than 0.1 μm and not more than 10 μm and an average length of roughness profile elements RSm of not less than 1 μm and not more than 100 μm, and that the diamond layer has a plurality of cavities extending from a portion bordering on the base material in a crystal growth direction.
摘要:
A carbon material and a method of manufacturing the carbon material are provided. By affixing diamond particles onto a carbonaceous substrate in a condition in which etching caused by hydrogen radicals is unlikely to occur, the substrate etching rate can be suppressed, and the carbon material is allowed to have a diamond thin film having excellent adhesion capability. The carbon material has a carbonaceous substrate showing a weight decrease under a diamond synthesis condition, diamond particles disposed on a surface of the carbonaceous substrate, and a diamond layer having the diamond particles as seeds. The weight of the diamond particles per unit area is set to from 1.0×10−4 g/cm2 to less than 3.0×10−3 g/cm2.
摘要翻译:提供碳材料和碳材料的制造方法。 通过在不可能发生由氢自由基引起的蚀刻的条件下将金刚石颗粒固定在碳质基材上,可以抑制基板蚀刻速率,并且使碳材料具有优异的粘附性能的金刚石薄膜。 碳材料具有显示在金刚石合成条件下重量减少的碳质基材,设置在碳质基材的表面上的金刚石颗粒和具有金刚石颗粒作为晶种的金刚石层。 每单位面积的金刚石颗粒的重量为1.0×10 -4 g / cm 2至小于3.0×10 -3 g / cm 2。
摘要:
The invention relates to a method for depositing a diamond coating onto a substrate, said method resulting in the production of a coating characterized by a novel morphology of the diamond in the form of pyramids containing submicronic grains. The method is carried out by chemical vapor deposition by controlling the applied electric field.
摘要:
The present invention provides an electrode for electrochemistry with a high quality, in which the surface area of the polycrystalline conductive diamond layer is increased and the crystal plane is controlled. In addition, when the catalyst layer of electrode substance is coated on the polycrystalline conductive diamond layer, adherence between the two layers is increased to provide an electrode for electrochemistry with a high durability. The polycrystalline conductive diamond layer is held under an atmosphere of carbon dioxide at a temperature 400 degrees Celsius or higher but 1000 degreesCelsius or lower to make the polycrystalline conductive diamond layer porous and make a specific crystal plane to remain and be formed.