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Composite materials based on tungsten carbide and having noble metal binders, and method for producing said composite materials

A technology of composite materials and precious metals, applied in hypodermic injection devices, blood pumps, suction devices, etc., can solve the problem of undisclosed containing composite materials

Inactive Publication Date: 2020-11-06
UNIVERSITY OF ROSTOCK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, composites containing at least 80% by weight (Gew.%) of WC and at least 2% by weight of noble metals are not disclosed

Method used

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  • Composite materials based on tungsten carbide and having noble metal binders, and method for producing said composite materials
  • Composite materials based on tungsten carbide and having noble metal binders, and method for producing said composite materials
  • Composite materials based on tungsten carbide and having noble metal binders, and method for producing said composite materials

Examples

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Embodiment

[0035] The preparation method of the sintered composite material of tungsten carbide and gold of the present invention is illustrated by way of example below:

[0036] 1. Preparation of sintered composite materials of tungsten carbide and gold.

[0037] 23.75g of tungsten carbide and 1.25g of gold powder were ground in hexane in a ball mill at 200rpm with a ball-to-powder ratio of 10:1 for 2 hours. The mixed powders were dried and transferred into graphite molds with a diameter of 20 mm. The powder is vacuum processed in graphite molds in the FAST chamber. The initial pressure is 10MPa. Over the next 15 minutes, the pressure rose steadily to 100 MPa. The maximum application pulse direct current of FAST method reaches 2kA, and the voltage reaches 5.3V. The sample is heated to 1600°C at a rate of 150K / min. During the sintering process, the residence time at 1600°C was 5min, after which the current was turned off, but the sample pressure was maintained. After the sintering ...

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Abstract

The invention relates to composite materials based on tungsten carbide and comprising gold, palladium and / or platinum and to a method for producing said composite materials by sintering. By means of the FAST method, hard and biocompatible WC / (Au, Pd, Pt) composite materials can be produced, inter alia for use as coatings on tools and prostheses and as solid bodies in, for example, blood pumps.

Description

technical field [0001] The invention relates to a sintered composite material based on tungsten carbide comprising the noble metals gold, platinum and / or palladium and a method for its preparation, the material. It has been found that the method of the invention makes it possible to produce particularly hard and biocompatible cemented carbides based on the sintering of tungsten carbide using gold, platinum and / or palladium. Its uses include nickel-free, wear-resistant hard design materials for food processing or pharmaceutical machinery components such as deflectors, nozzles and diaphragms, and medical device materials for implants or processing tools such as knives and scissors . Furthermore, these cemented carbides can also be used, for example, as coatings for tools and prostheses in medical technology, and as solid bodies for pumps. Background technique [0002] Cemented carbides are characterized by very high hardness, especially at higher temperatures, and good wear ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C04B35/56C22C29/06C22C29/08A61M1/12A61M60/122
CPCC04B35/5626C04B35/645C04B2235/408C04B2235/5445C04B2235/5454C04B2235/6562C04B2235/6581C04B2235/666C04B2235/72C04B2235/77C04B2235/785C04B2235/80C04B2235/96B22F3/105B22F2003/1051C22C29/067C22C29/08A61M60/122B22F2302/10B22F2301/25
Inventor 卡斯特·达梅罗维克托·博德纳埃伯哈德·伯克尔
Owner UNIVERSITY OF ROSTOCK
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