Directionally grown titanium carbonitride crystal, preparation method and application thereof

A technology of titanium carbonitride and directional growth, which is applied in chemical instruments and methods, crystal growth, single crystal growth, etc., can solve the problem of low temperature strength of cermets, cannot be used for a long time, and cannot fundamentally improve the collapse resistance of cermets Loss of performance and other issues, to achieve the effect of low cost and strong feasibility

Active Publication Date: 2021-07-23
JIAXING Z-SHARP ADVANCED MATERIALS TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, because different from the pure ceramic structure, there is a large concentration gradient inside the cermet, simply reducing the particle size of the hard ceramic phase, and the exponentially increasing surface area of ​​the hard phase requires a larger volume fraction of the metal phase to form a binder phase to provide sintering. When the liquid phase sintering and the toughness of the sintered body are improved, the higher volume fraction of the binder phase leads to a serious decrease in the high temperature strength of th

Method used

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  • Directionally grown titanium carbonitride crystal, preparation method and application thereof
  • Directionally grown titanium carbonitride crystal, preparation method and application thereof
  • Directionally grown titanium carbonitride crystal, preparation method and application thereof

Examples

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Example Embodiment

[0038] Example 1

[0039]3.9 parts of titanium powder, 1 carbon black powder and 0.5 parts of urea drying were mixed into the vessel after mixing 20h, and the high temperature furnace was fed under an argon atmosphere of 100 nl / min, and calcined under 800 ° C. 0.5 H, take out the cooling; after the mixture of methane composed of 1: 2, the high temperature furnace is calcined again under a mixed gas atmosphere of nitrogen, calcined under 1000 ° C, and the cooling is taken out and grade carbonide titanium nitride. Crystal, scanning electron microscopy figure 1 .

[0040] The titanium carbonitide crystal length obtained in this example is about 0.5 μm, and the length diameter is about 1: 1, and the amount of carbon contains 9.5%, containing 11.2% nitrogen.

Example Embodiment

[0041] Example 2

[0042] It is called 4.1 parts of sponge titanium powder, 0.5 parts of graphite powder and 2 parts of glyciodofi mixing for 40 h, and a high temperature furnace is fed under a helium atmosphere of 25 nl / min, calcined under 1300 ° C for 2 h. The cooling is taken out; after the mixture of acetylene having a volume ratio of 2: 1, a high-temperature furnace is calcined again, calcined at 1800 ° C, calcined at 1800 ° C, and the cooling is taken out and graded to give a carbonize nitride. Titanium crystal, its scanning electron microscope figure 2 .

[0043] The carbonitride crystal length obtained in this example is about 80 μm, with a long diameter ratio of 3: 1, containing 13.7% carbon content, and contains 8.1%.

Example Embodiment

[0044] Example 3

[0045] It is weighted 4 parts of the hydrogenated titanium powder, 0.8 parts of grapse powder and 1 part of the amide dry for 30h, and the vessel is fed into a vessel under a helper atmosphere of 50 nl / min, and calcined at 1000 ° C for 1 h. The cooling is taken out; after the acetylene having a volume ratio of 2: 1, the high temperature furnace is calcined again, and calcined at 1500 ° C for 1 h, and the cooling and grading to the growth of titanium nitride crystals. , Is a scanning electron microscope image 3 .

[0046] The carbonitide crystal length obtained in this example is about 5 μm, and the length diameter ratio is about 6: 1, containing 6.6% carbon content, containing 13.9% nitrogen.

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Abstract

The invention discloses a directionally grown titanium carbonitride crystal as well as a preparation method and an application thereof, and belongs to the technical field of metal ceramic composite material raw material manufacturing. The preparation method of the titanium carbonitride crystal comprises the following steps: weighing a titanium source, a nitrogen source and a carbon source, uniformly mixing, calcining in a protective gas atmosphere, taking out and cooling, then carrying out high-temperature calcination again, taking out and cooling to obtain the directionally grown titanium carbonitride crystal. The titanium carbonitride crystal prepared by the method has extremely high collapse damage resistance and hardness due to directional arrangement of the crystal, is compact in structure, and can be used in sintered bodies of cutting tools and wear-resistant parts and coating materials.

Description

technical field [0001] The invention relates to a directional growth titanium carbonitride crystal, a preparation method and an application thereof, and belongs to the technical field of raw material manufacturing of cermet composite materials. Background technique [0002] Titanium carbonitride-based cermets, as a type of titanium-based cemented carbide, are used in the manufacture of cutting materials because they have higher red hardness, better oxidation resistance and stronger wear resistance than tungsten-cobalt cemented carbide. The sintered body of tools and wear-resistant parts, and because of its excellent surface processing quality, is often used in semi-finishing and finishing. Although titanium carbonitride-based cermet materials have been developed considerably, cermet materials are not currently widely used for roughing or mining tools with interrupted cutting characteristics. The reason is that cermet materials, as cutting tools, are still not comparable to ...

Claims

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Application Information

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IPC IPC(8): C30B1/10C30B29/38C30B29/60C22C29/04
CPCC30B1/10C30B29/38C30B29/60C22C29/04Y02E60/36
Inventor 王博张斌王诗阳
Owner JIAXING Z-SHARP ADVANCED MATERIALS TECH CO LTD
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