摘要:
Process and apparatus for pre-treatment of a substrate surface in a vacuum by a glow discharge for a subsequent coating process in a vacuum. The process includes maintaining a low pressure glow discharge between the substrate to be pre-treated and a counter-electrode, where the counter-electrode composed of at least a component of the coating to be deposited in the vacuum coating process. The process also includes periodically alternating a polarity of the substrate to act as a cathode or as an anode of the low pressure glow discharge, and individually controlling at least one of pulse length and discharge voltage in both polarities. A frequency of alternation of the polarity is set within a range of between 1 Hz and 1000 kHz. The apparatus includes an evacuatable vacuum chamber, a substrate holder positioned to hold a substrate to be pre-treated, at least one counter-electrode, and an alternating voltage generator coupled to the substrate to be pre-treated and the at least one counter-electrode. The substrate and the counter-electrode are mounted in a potential-free manner.
摘要:
Vacuum coated compound body and a process for its production. Such compound bodies, when coated in a known manner, have a carrier of a metal or of an alloy, a layer that is thermally, mechanically and chemically unstable, with their surface showing cracks and being partially porous. These shortcomings are overcome via an improved eco-friendly vacuum deposition process wherein at least one layer of a material having an outer layer is of Al.sub.2 O.sub.3, is applied to the metal or alloy carrier at a maximum of 700.degree. C., with this layer being completely crystalline and comprised of an .alpha.Al.sub.2 O.sub.3 phase and possibly of a .gamma.Al.sub.2 O.sub.3 phase with a (440) texture, having a compressive stress of at least 1 Gpa and a hardness of at least 20 Gpa, with the Al.sub.2 O.sub.3 layer being deposited via reactive magnetron sputtering, wherein the magnetrons are pulse powered, the pulse frequency lies between 20 and 100 Khz, and the deposition rate is at least 1 nm/s, with the compound bodies being utilized for cutting treatments, particularly as drills, milling cutters, reamers, broaches or saw blades.
摘要翻译:真空涂层复合体及其生产工艺。 当以已知的方式涂覆时,这种复合体具有金属或合金的载体,即热,机械和化学不稳定的层,其表面显示出裂纹并且是部分多孔的。 通过改进的环保真空沉积工艺克服了这些缺点,其中至少一层具有外层的材料为Al 2 O 3,最多在700℃下施加到金属或合金载体上,该层为 完全结晶并且由αAl 2 O 3相和可能具有(440)织构的γAl 2 O 3相组成,具有至少1Gpa的压缩应力和至少20Gpa的硬度,其中Al 2 O 3层通过反应磁控管沉积 溅射,其中磁控管是脉冲供电的,脉冲频率在20和100KHz之间,并且沉积速率为至少1nm / s,复合体用于切割处理,特别是作为钻头,铣刀,铰刀, 拉刀或锯片。
摘要:
Compound body of a vacuum coated sintered material and a process for its production. Such compound bodies, when coated in a known manner, have a carrier of sintered material coated with a layer that is thermally, mechanically and chemically unstable, with their surface showings cracks and being partially porous. These shortcomings are overcome via an improved eco-friendly vacuum deposition process, wherein at least one layer of a material, having an outer layer of Al.sub.2 O.sub.3, is applied to the carrier of sintered material at a maximum of 800.degree. C., with this layer being completely crystalline and comprised of an .alpha.Al.sub.2 O.sub..sub.3 phase and possibly of a .gamma.Al.sub.2 O.sub.3 phase with a (440) texture, having a compressive stress of at least 1 GPa and a hardness of at least 20 GPa, with the Al.sub.2 O.sub.3 layer being deposited via reactive magnetron sputtering, wherein the magnetrons are pulse driven, the pulse frequency lies between 20 and 100 Khz and the deposition rate is at least 1 nm/s, with the resulting compound bodies being utilized for cutting treatments, particularly as cemented carbide inserts.
摘要翻译:真空涂覆烧结材料的复合体及其制造方法。 这种复合体以已知的方式涂覆时,具有涂覆有热,机械和化学不稳定的层的烧结材料的载体,其表面显示出裂纹并且是部分多孔的。 通过改进的环保真空沉积工艺克服了这些缺点,其中至少一层具有Al 2 O 3外层的材料最多在800℃下施加到烧结材料的载体上,该层 是完全结晶的,并且由αAl 2 O 3相和可能具有(440)织构的γAl 2 O 3相组成,具有至少1GPa的压缩应力和至少20GPa的硬度,Al 2 O 3层通过反应性沉积 磁控管溅射,其中磁控管是脉冲驱动的,脉冲频率在20和100KHz之间,并且沉积速率为至少1nm / s,所得到的复合体用于切割处理,特别是作为硬质合金刀片。
摘要:
A process and apparatus for plasma-activated electron beam vaporization isrovided. The vaporizing material from at least two vaporizer crucibles is vaporized with electron beams. An electric voltage is applied to the vaporizer crucibles in such a way that the vapor-emitting areas serve as electrodes of an electric discharge. The vaporizing material acts as a cathode or anode. The process and apparatus are preferably intended for the reactive coating of large surfaces and for the reactive coating of components, tools and strip steel.
摘要:
A process an device for ion-supported vacuum coating. The process and the affiliated device is intended to permit the high-rate ating of large-surfaced, electrically conductive and electrically insulating substrates with electrically insulating and electrically conductive coatings with relatively low expenditure. The substrates are predominantly band-shaped, in particular plastic sheets with widths of over a meter. According to the invention, in an intrinsically known device for vacuum coating, alternating negative and positive voltage pulses are applied to the electrically conductive substrate or in electrically insulating substrates, to an electrode disposed directly behind them, e.g. the cooling roller, relative to the plasma or to an electrode that is disposed almost at plasma potential. The form, the voltage, and the duration of the pulses are adapted to the coating task and the material. The process is used particularly for depositing abrasion protection, corrosion protection, and barrier coatings. The user is the packaging industry, among others.
摘要:
Device for the vacuum coating of mass produced products. By means of the ice small parts, such as screws and bolts, as mass produced products are highly productively coated by vacuum deposition or sputtering, also under plasma action. In a container is located a drum rotatable at high speed about its horizontal axis and in which the parts to be coated are fixed to the inner wall by centrifugal force. The surface of the inner wall is geometrically constructed such that the parts to be coated are reliably held and moved with it. The coating devices are located in the drum. A stripping device, whose spacing with respect to the inner wall is adjustable at programmable time intervals, is located in the drum and has an abutment surface directed opposite to the rotation direction.
摘要:
Magnetron discharges are pulse-operated to avoid the so-called “arcing”. In the case of magnetron discharges from alternating current-fed magnetrons, the process is limited to the minor power of the energy supply because of the load-carrying capacity of the required electric components. When the magnetron discharges are fed by direct current, their effectiveness deteriorates because of the deposition of layers on the anode surfaces. The new process should enable a high supply power and prevent arcing. In magnetron discharges with at least two magnetron electrodes, the energy is supplied in such a way that at least one magnetron electrode is a cathode or anode and a number n1 of direct current pulses of said polarity is supplied. The poles of at least one magnetron electrode are then reversed and a number n2 of direct currents of this polarity are supplied. The process is carried on in this manner, the frequency of the direct current pulses being higher than that of the polarity reversals. The energy supply effectiveness is thus improved. This process and system enable the production of layers having the most different properties, for example for the glass, packaging, electronic, and machine construction industries.
摘要:
A process and circuit for the bipolar pulse-shaped feeding of energy into low-pressure plasmas is provided. Within an average time period, a power which is to be as high as possible is to be fed into the low pressure discharge. In each polarization, the same power is to be fed although the impedance differs considerably. In a system for plasma and surface treatment techniques having at least two electrodes and one power supply, the outputs of at least two potential-free direct current supplies are switched such that an output of one direct current supply is conductively connected with an output of the same polarity of the other direct current supply. By means of a switch which is connected with each feed line to the electrodes and whose other outputs are led in a combined manner to the other outputs of the direct current source, these switches are operated via a timing generator in synchronism with the pole changing frequency. The switches are opened up in the event of the occurrence of an arcing. The process is used for the bipolar pulse sputtering for depositing electrically insulating layers on workpieces. Preferably, such layers are used for a mechanical protection, protection against wear and the improvement of sliding characteristics.