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Process for manufacturing metal containing powder

A metal powder, metal technology, applied in metal hydrides, non-metallic elements, chemical instruments and methods, etc., can solve problems such as low purity

Inactive Publication Date: 2016-03-09
HOGANAS AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods usually yield products of low purity

Method used

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  • Process for manufacturing metal containing powder
  • Process for manufacturing metal containing powder
  • Process for manufacturing metal containing powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0108] by TiO 2 Powder (100g) and calcium granules (130g) are used as raw materials to prepare titanium

[0109] This example was carried out with the heat treatment conditions mentioned above, with the only exception that the heating was carried out under hydrogen for 2 hours and then switched to argon. The resulting titanium powder particles had an X50 particle size of 117.64 microns and did not form agglomerates. The oxygen content is 0.30%, the nitrogen content is 0.08%, and the hydrogen content is 0.28%. The XRD pattern shows that titanium without impurities is obtained. This confirms that heat treatment of TiO under the same heat treatment conditions but under the protection of hydrogen 2 and calcium particles and subsequent dehydrogenation under an argon atmosphere was successful.

[0110] Calcium content was 0.25% as shown by ICP analysis.

Embodiment 3

[0112] by TiO 2 (100 g) and CaH 2 Granules (145 grams) were prepared from titanium.

[0113] TiO in powder form 2 (Aldrich) and CaH 2 Particles (0.4- AB) mix.

[0114] The mixture was heated at 1100°C under hydrogen in an open muffle furnace for 2 hours. After heating, the mixture was cooled under an argon atmosphere for 1 hour.

[0115] The resulting titanium powder particles had an X50 particle size of 20.06 microns and did not form agglomerates. The oxygen content is 0.27%, the nitrogen content is 0.016%, and the hydrogen content is 0.17%. The XRD pattern shows that titanium without impurities is obtained.

[0116] Calcium content was 0.22% as shown by ICP analysis.

Embodiment 4

[0118] by TiO 2 and CaH 2 Titanium hydride prepared from particles

[0119] 100 grams of TiO in powder form 2 (Aldrich) with 145 grams of calcium hydride particles with a size of 0.4-2mm ( AB) mix. The mixture of powder and granules was heated in an open muffle furnace under hydrogen at 1100° C. for 2 hours. After heating, the mixture was cooled under hydrogen atmosphere for 1 hour.

[0120] The resulting titanium hydride powder particles had an X50 particle size of 6.35 microns and did not form agglomerates. The oxygen content is 0.17%, the nitrogen content is 0.73%, and the hydrogen content is 3.63%. The XRD pattern shows that titanium hydride without impurities is obtained.

[0121] Calcium content was 0.17% as shown by ICP analysis.

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Abstract

The invention provides a process for manufacturing metal containing powder, the process comprising the steps of: (a) mixing at least one metal oxide powder with Ca or Mg granules and / or calcium hydride in granule or powder form to form a mixture; (b) maintaining said mixture under an H2 atmosphere, at a temperature between 1000 DEG C and 1500 DEG C for 1-10 hours, followed by: (c) recovering metal containing powder. In one embodiment, metal hydride powder is recovered. In another embodiment the process further includes between steps (b) and (c): (d) switching the H2 atmosphere to an Ar atmosphere and maintaining the mixture thereunder for a period of 20 minutes to 5 hours, followed by: (e) cooling under Ar atmosphere, wherein metal powder is recovered in step (c).

Description

field of invention [0001] The present invention relates to the manufacture of metal powders, metal alloy powders, intermetallic powders and / or their hydrogenation by a simple cost-effective process, preferably by reduction of metal oxides under hydrogen protection using specific reducing agents and specific reducing conditions A novel approach to powders. Background of the invention [0002] Powder metallurgy (PM) technology is a well-established approach for the efficient manufacture of composite metal-based components. These techniques are commonly used in applications requiring alloys based on iron, stainless steel, copper or nickel. However, applications of PM techniques requiring materials such as titanium, chromium and tantalum have so far been limited due to insufficient availability of corresponding high-quality powders. [0003] Titanium metal-based alloy and non-titanium metal-based alloy powders are advanced materials, they are the key to performance improvement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/00B22F9/22C22C1/04B22F1/00
CPCC01B6/00C22C1/04B22F2999/00B22F9/22B22F1/00B22F2201/013B22F2201/11B22F2301/00B22F2301/052B22F2301/20B22F2301/205B22F2301/30B22F2301/45B22F2302/45
Inventor G·亚当H·维达尔森
Owner HOGANAS AB
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