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Compound biological material of compact high-strength titanium silicidation/calcium silicate

A technology of composite biological material and titanium silicide, applied in medical science, prosthesis and other directions, can solve the problems of high brittleness, limited application, difficult processing, etc., and achieve the effects of low cost, simple preparation steps, and simple preparation process.

Inactive Publication Date: 2007-09-26
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing studies have shown that the use of these traditional inert ceramics to strengthen active ceramics does not improve the mechanical properties significantly, and the reason may be that the difference in thermal expansion coefficient is not conducive to sintering and densification.
In addition, the shortcomings of ceramic materials such as high brittleness and difficult processing also greatly limit its application.

Method used

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  • Compound biological material of compact high-strength titanium silicidation/calcium silicate
  • Compound biological material of compact high-strength titanium silicidation/calcium silicate
  • Compound biological material of compact high-strength titanium silicidation/calcium silicate

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Experimental program
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Effect test

Embodiment 1

[0019] The calcium silicate powder is mixed uniformly with 90% volume percentage of calcium silicate powder and 10% volume percentage of titanium silicide carbon powder, put into a graphite mold, and sintered in a vacuum environment in a discharge plasma sintering system. The heating rate is about 100°C / min, the sintering temperature is 1090°C, and a pressure of 40MPa is applied during sintering, and the temperature is kept for 10 minutes and then cooled at a rate of 100°C / min. The density of the bulk material is greater than 98%. The mechanical properties are flexural strength: 116MPa, toughness: 1.69MPa m 1 / 2 , the hardness is about 6GPa.

Embodiment 2

[0021] The calcium silicate powder is mixed evenly with 80% volume percentage of calcium silicate powder and 20% volume percentage of titanium silicide carbon powder, put into a graphite mold, and sintered in a vacuum environment in a discharge plasma sintering system. The heating rate is about 100°C / min, the sintering temperature is 1070°C, 40MPa pressure is applied during sintering, and the temperature is kept for 5 minutes, and then cooled at a rate of 100°C / min. The density of the bulk material is greater than 98%. The mechanical properties are flexural strength: 186MPa, toughness: 2.23MPa m 1 / 2 , the hardness is about 6GPa.

Embodiment 3

[0023] The calcium silicate powder is mixed uniformly with 70% volume percentage of calcium silicate powder and 30% volume percentage of titanium silicide carbon powder, put into a graphite mold, and sintered in a vacuum environment in a discharge plasma sintering system. The heating rate is about 100°C / min, the sintering temperature is 1070°C, 40MPa pressure is applied during sintering, and the temperature is kept for 5 minutes and cooled at a rate of 100°C / min. The density of the bulk material is greater than 98%. The mechanical properties are flexural strength: 271MPa, toughness: 2.47MPa m 1 / 2 , the hardness is about 6GPa.

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Abstract

The invention relates to a method for preparing high-density high-strength titanium silicide carbon / calcium silicate composite biological material, belonging to biological material technique. The invention is characterized in that using titanium silicide carbon and calcium silicate powders as materials, to be mixed uniformly, to discharge, sinter plasma, thermally sinter or non-pressure sinter in vacuum or non-oxide condition, to obtain the high-density titanium silicide carbon / calcium silicate composite material with uniformly distributed two phases. The inventive preparation has low cost, simple process and better physical properties, while the bending strength is 100-400MPa, the fracture toughness property is 1.5-3.5MPa.m<1 / 2>, and the diamond pyramid hardness is 6GPa, the product has better biological activity and machinability, to support batch production.

Description

technical field [0001] The invention relates to a dense high-strength titanium silicide carbon / calcium silicate composite biological material and a preparation method thereof, belonging to the field of biological materials. Background technique [0002] In the 1980s, T.Kokubo and others invented A-W bioglass. Calcium silicate, as one of the two microcrystalline phases, not only contributes to the mechanical properties of A-W glass, but also has high biological activity. Punname Siriphannon and others at the Tokyo Institute of Technology in Japan believe that the formation speed of hydroxyapatite deposits on the surface of calcium silicate ceramics is faster than that of all currently reported bioglasses and glass-ceramics. However, although calcium silicate has excellent bioactivity, its sintering performance is poor, and it is difficult to form dense materials, resulting in poor mechanical properties of bulk materials. Therefore can't be applied on the body load-bearing pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/42A61L27/10A61L27/02
Inventor 江莞赵嵩珏王连军张建峰陈立东
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI