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HfxZr1-xC ceramic solid solution nanowire and preparation method thereof

A nanowire, solid solution technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the loss of toughening effect, no ceramic solid solution nanowire preparation and application reports, nanowire impact Toughening effect and other problems, to achieve the effect of simple preparation process, large specific surface area, and easy operation of preparation process

Inactive Publication Date: 2020-11-17
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In the application of traditional single-phase nanowires to toughen coatings, rapid and severe oxidation inevitably occurs, resulting in the loss of toughening effects.
At the same time, the structure and morphology of nanowires will also affect the toughening effect.
However, the preparation and application of such ceramic solid solution nanowires have not been reported so far.

Method used

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  • HfxZr1-xC ceramic solid solution nanowire and preparation method thereof
  • HfxZr1-xC ceramic solid solution nanowire and preparation method thereof
  • HfxZr1-xC ceramic solid solution nanowire and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A new type of Hf x Zr 1-x C The preparation method of ceramic solid solution nanowire, this preparation method comprises the following steps:

[0038] Step S1: Grind and polish the C / C composite material matrix with a size of (8mm*8mm*2mm), ultrasonically clean it for 10-30 minutes, and put it in an oven to dry for later use;

[0039] Step S2: Ni(NO 3 ) 2 Configured as a solution with a concentration of 0.5mol / L;

[0040] Step S3: Put the prepared C / C composite material into the Ni(NO 3 ) 2 Soak in the solution for 8 hours, then dry in an oven at 80°C for 4 hours to obtain the initial sample;

[0041] Step S4: Preparation of Hf by LPCVD x Zr 1-x The specific method of C nanowire is as follows:

[0042] Step S41: Hang and place the first sample dried in step S3 in a tubular chemical vapor deposition furnace, and weigh HfCl according to a molar ratio of 3:7 4 and ZrCl 4 Powder, placed in a volatilization container;

[0043] Step S42: Use a vacuum pump to pump ...

Embodiment 2

[0047] A new type of Hf x Zr 1-x C The preparation method of ceramic solid solution nanowire, this preparation method comprises the following steps:

[0048] Step S1: Grind and polish the C / C composite material matrix with a size of (8mm*8mm*2mm), ultrasonically clean it for 10-30 minutes, and put it in an oven to dry for later use;

[0049] Step S2: Ni(NO 3 ) 2 Configured as a solution with a concentration of 0.8mol / L;

[0050] Step S3: Put the prepared C / C composite material into the Ni(NO 3 ) 2 Soak in the solution for 8 hours, then dry in an oven at 80°C for 4 hours to obtain the initial sample;

[0051] Step S4: Preparation of Hf by LPCVD x Zr 1-x The specific method of C nanowire is as follows:

[0052] Step S41: Hang and place the first sample dried in step S3 in a tubular chemical vapor deposition furnace, and weigh HfCl according to a molar ratio of 5:5 4 and ZrCl 4 Powder, placed in a volatilization container;

[0053] Step S42: Use a vacuum pump to pump ...

Embodiment 3

[0057] A new type of Hf x Zr 1-x C The preparation method of ceramic solid solution nanowire, this preparation method comprises the following steps:

[0058] Step S1: Grind and polish the C / C composite material matrix with a size of (8mm*8mm*2mm), ultrasonically clean it for 10-30 minutes, and put it in an oven to dry for later use;

[0059] Step S2: Ni(NO 3 ) 2 Configured as a solution with a concentration of 1.0mol / L;

[0060] Step S3: Put the prepared C / C composite material into the Ni(NO 3 ) 2 Soak in the solution for 8 hours, then dry in an oven at 80°C for 4 hours to obtain the initial sample;

[0061] Step S4: Preparation of Hf by LPCVD x Zr 1-x The specific method of C nanowire is as follows:

[0062] Step S41: Hang and place the first sample dried in step S3 in a tubular chemical vapor deposition furnace, and weigh HfCl according to a molar ratio of 7:3 4 and ZrCl 4 Powder, placed in a volatilization container;

[0063] Step S42: Use a vacuum pump to pump ...

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Abstract

The invention relates to an HfxZr1-xC ceramic solid solution nanowire and a preparation method. The method comprises: respectively weighing precursors with different masses, and configuring accordingto different molar ratios; and preparing the HfxZr1-xC solid solution nanowire on the surface of a carbon / carbon composite material by adopting a low-pressure chemical vapor deposition (LPCVD) technology. The atomic molar ratio in the solid solution nanowire can be regulated and controlled by regulating and controlling the content of each component in the mixed precursor powder, and the microstructure of the solid solution nanowire can be effectively controlled by regulating and controlling LPCVD process parameters. The preparation process is simple and easy to operate, the morphology of the nanowire can be effectively controlled, and the application of the nanowire in the fields of various materials is expanded.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and relates to a Hf x Zr 1-x C ceramic solid solution nanowire and preparation method. Background technique [0002] Ultra-high temperature ceramic carbides (HfC, ZrC, etc.) have high melting point, high hardness, excellent physical and chemical properties and good ablation resistance, and their one-dimensional nanowire / tube materials have both the excellent properties of bulk ceramics and The unique geometric characteristics of one-dimensional nanomaterials are ideal strengthening and toughening reinforcement materials for composite materials, but the inherent brittleness of ultra-high temperature ceramics reduces its strengthening and toughening effect. Since HfC and ZrC have similar crystal structures, and the atomic radii of Hf and Zr are close, a continuous solid solution can be formed. The formed solid solution structure Hf x Zr 1-x C can inhibit the transformation of crysta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/626C04B41/87B82Y30/00B82Y40/00
CPCC04B35/5622C04B35/62605C04B41/009C04B41/87C04B41/5057B82Y30/00B82Y40/00C04B41/4531C04B35/83
Inventor 张雨雷张建
Owner NORTHWESTERN POLYTECHNICAL UNIV
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