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Os2B3 hard material and preparation and application thereof

A technology for hard materials and raw materials, which is applied to Os2B3 hard materials and their preparation and application fields, can solve problems such as affecting structure and mechanical properties, and achieve the effects of high hardness, simple and easy process, and high chemical stability.

Inactive Publication Date: 2017-09-08
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

However, OsB 2 It is an extremely brittle material, and it is prone to phase transformation under high temperature conditions, which affects its structure and mechanical properties

Method used

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  • Os2B3 hard material and preparation and application thereof
  • Os2B3 hard material and preparation and application thereof
  • Os2B3 hard material and preparation and application thereof

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Embodiment Construction

[0036] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0037] 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) and boron powder (B) were mixed in a stoichiometric ratio of 1:2. A total of six tungsten carbide grinding balls are used, with a size of 11.20mm, and the mass ratio of the balls to the mixed powder is 4:1. 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).

[0038] figure 1 XRD patterns for different milling periods. Depend on figure 1 (a) It can be seen that with the prolongation of ball milling time, the peak of osmium (Os) weakens and the peak shape...

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Abstract

The invention belongs to the field of inorganic nonmetallic hard materials, and particularly relates to an Os2B3 hard material and a preparation method and application thereof. The preparation method comprises the following steps: by a mechanochemical method, with high-purity Os powder and B powder as raw materials, synthesizing Os2B3 powder at room temperature by using high-energy ball milling equipment; then, by high-temperature sintering technology, and performing compacted sintering on the synthesized Os2B3 powder under the protection of an argon atmosphere to obtain a high-compactness and high-hardness block material. By the preparation method, the Os2B3 powder is synthesized at room temperature, and the Os2B3 block material adopting a hexagonal structure and having high temperature stability is prepared. The Os2B3 material prepared by the preparation method provided by the invention can be applied to the industrial fields of cutting tools, machine manufacturing, aerospace, automobiles and the like.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic hard materials, in particular to a kind of Os 2 B 3 Hard materials and their preparation and applications. Background technique [0002] Due to their excellent properties such as high hardness, good wear resistance and chemical stability, superhard materials are widely used in many fields such as machinery manufacturing, construction, aerospace and automobiles. At present, the superhard materials widely used in industry are mainly diamond and cubic boron nitride. However, both diamond and cubic boron carbide need to be synthesized under high temperature and high pressure conditions. Therefore, it is necessary to develop a new type of superhard material that can be synthesized at low temperature or normal temperature to reduce its production cost. [0003] Transition metal borides have attracted much attention because of their high hardness, high bulk modulus, high mechanical strength, and...

Claims

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Application Information

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IPC IPC(8): C04B35/58C04B35/626C04B35/64C04B35/634
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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