Novel ternary osmium-rhenium diboride (Os<1-x>Re<2>B<2>) hard material and preparation method thereof

A technology of os1-xrexb2 and hard materials, which is applied in the field of diboride hard materials and its preparation, can solve the problems of industrial application limitations of diamond and cubic boron carbide, and achieve the effect of high hardness

Inactive Publication Date: 2017-08-15
GUANGDONG UNIV OF TECH
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Therefore, the industrial applications ...

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  • Novel ternary osmium-rhenium diboride (Os&lt;1-x&gt;Re&lt;2&gt;B&lt;2&gt;) hard material and preparation method thereof
  • Novel ternary osmium-rhenium diboride (Os&lt;1-x&gt;Re&lt;2&gt;B&lt;2&gt;) hard material and preparation method thereof
  • Novel ternary osmium-rhenium diboride (Os&lt;1-x&gt;Re&lt;2&gt;B&lt;2&gt;) hard material and preparation method thereof

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Embodiment Construction

[0032] The powder was synthesized by using a high-energy ball mill model 8000M of the American SPEX company. First, in a glove box filled with argon gas, high-purity osmium powder (Os), rhenium powder (Re) (the molar ratio of osmium powder and rhenium powder is 9:1) and boron powder (B) are stoichiometrically Mix ingredients in a ratio of 1:2.5 or 1:3. A total of six tungsten carbide grinding balls were used, with a size of 11.20mm, and the mass ratio of the balls to the mixed powder was 4:1.

[0033] Fix the tungsten carbide ball mill jar with powder and balls on the high energy ball mill. The total time of ball milling is 40h, every hour of ball milling is shut down for 20min (to prevent the engine from overheating).

[0034] figure 1 It is the XRD spectrum of the boride formed after ball milling for 40 hours without adding rhenium powder and adding a certain amount of rhenium powder.

[0035] It can be seen from the figure that the main phase of mixed powders with diffe...

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Abstract

The invention discloses a transition metal osmium-rhenium diboride (Os<1-x>Re<2>B<2>) material with high hardness and wear resistance and a preparation method thereof and belongs to the field of inorganic non-metallic hard materials. According to the technical scheme, the method comprises the following steps: by adopting a mechanical and chemical method and high-energy ball mill equipment, and taking high-purity osmium (Os) powder, rhenium (Re) powder and boron (B) powder as raw materials, synthesizing osmium-rhenium diboride powder at a room temperature; and carrying out dense sintering on the synthesized osmium-rhenium diboride powder under an argon protection atmosphere by using a high-temperature sintering technology to obtain a high-density and high-hardness bulk material. The transition metal osmium-rhenium diboride (Os<1-x>Re<2>B<2>) material has the characteristics that the osmium-rhenium diboride powder is synthesized at the room temperature and the osmium-rhenium diboride (Os<1-x>Re<2>B<2>) bulk material of a hexagonal structure with high-temperature stability is prepared. The prepared osmium-rhenium diboride material can be applied to industrial uses, such as cutting tools and grinding.

Description

technical field [0001] The invention relates to a diboride (Os1-xRexB2) hard material and a preparation method thereof. Background technique [0002] Due to its special physical and chemical properties such as high hardness, wear resistance, and good thermal stability, superhard materials have rapidly become one of the important basic functional materials in the field of modern industry and scientific and technological research. The superhard materials currently used in industrial production are mainly diamond and cubic boron carbide. However, the thermal and chemical stability of diamond is poor, and it is easily oxidized when heated to 800°C in air. In addition, when processing ferrous metal workpieces, carbon will penetrate into the workpiece, resulting in workpiece wear and work hardening. The thermal stability and chemical stability of cubic boron carbide are better than diamond, but because this kind of material needs to be prepared under high temperature and high pre...

Claims

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Application Information

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IPC IPC(8): C04B35/58C01B35/04
CPCC04B35/5805C01B35/04C01P2002/72C01P2004/03
Inventor 龙莹邹灿辉郑鑫林华泰安立楠张凤林
Owner GUANGDONG UNIV OF TECH
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