A corrosion resistant object having an outer layer of a ceramic material

A technology of ceramic materials and objects, applied in the direction of metal material coating process, coating, electrical components, etc., can solve the problems of high cost and inapplicability

Inactive Publication Date: 2008-06-25
坦塔莱恩化学气相沉积控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are cases where the above method does not apply
Because noble metals are generally relatively expensive, the costs involved in making electrodes entirely from noble metals or providing noble metal layers are often considered prohibitive

Method used

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  • A corrosion resistant object having an outer layer of a ceramic material

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Embodiment Construction

[0043] Figure 1 shows an object 1 according to an embodiment of the invention. The object 1 comprises an electrically conductive body part 2, eg made of or comprising copper or silver.

[0044] FIG. 2 shows the item 1 of FIG. 1 . In Fig. 2, the outer surface 3 of the body part 2 has been provided with a coating 4 comprising a refractory metal, preferably tantalum. The layer 4 is applied in order to improve the corrosion resistance properties of the object 1 .

[0045] FIG. 3 shows the item 1 of FIGS. 1 and 2 . In Fig. 3, the object 1 has been processed in such a way that the outer part 5 of the refractory metal layer 4 has been converted into a conductive ceramic material. The ceramic material 5 may advantageously be tantalum boride, such as TaB 2 . The ceramic material 5 prevents oxidation of the refractory metal layer 4 and thus prevents passivation of the object 1 .

[0046] Figures 1-3 thus illustrate a method of forming an object 1 according to an embodiment of the ...

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Abstract

An object comprising an electrically conductive body part, e.g. comprising copper or silver, and a layer comprising a refractory metal, preferably tantalum. At least part of the refractory metal layer has been transformed into an electrically conductive ceramic material, preferably a tantalum boride. The refractory metal layer improves the corrosion resistant properties of the object and the ceramic material prevents oxidation of the refractory metal layer, and thereby passivation of the object during conduction of a current. The object is suitable for use as an electrode in corrosive environments. The object is cost effective because passivation can be avoided without applying a layer of precious metal. Also a method of forming the object in which the ceramic material is preferably provided by applying boride in a gaseous or solid phase and heating the object.

Description

technical field [0001] The invention relates to an article which is corrosion-resistant on the one hand and electrically conductive on the other hand. Furthermore, the invention relates to a method of manufacturing an object in an economical manner without reducing the corrosion resistance or conductive properties of the object. The articles of the present invention are ideally used as electrodes for use in corrosive environments. Background technique [0002] For some applications it is desirable to provide a conductive, corrosion resistant surface. This expectation is relevant, for example, when manufacturing electrodes for destructive or aggressive media such as acids, bases, environments containing ions (eg chloride ions, etc.). Currently, such electrodes are typically made of noble metals such as gold or platinum or corrosion-resistant materials such as tantalum, niobium, titanium, zirconium, etc., with an outer layer of noble metal with a thickness of about 1 μm to 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/00H01T19/00C23C14/06
CPCC23C8/02C23C26/00Y10T428/26
Inventor B·吉尔斯伯格E·克里斯滕森H·J·佩德森
Owner 坦塔莱恩化学气相沉积控股有限公司
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