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Nano (ti,m)c solid solution whiskers and preparation method thereof

A solid solution and nanotechnology, applied in self-solid, chemical instruments and methods, single crystal growth, etc., can solve problems such as poor interface bonding, and achieve the effect of solving poor interface bonding, low price, and less impurity content

Active Publication Date: 2018-10-09
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid solution whiskers can be used as nano-ceramic phase whiskers to toughen and reinforce metal matrix and ceramic matrix composite materials, which can effectively solve the technical problem of poor interface bonding between the existing TiC whiskers and the matrix

Method used

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  • Nano (ti,m)c solid solution whiskers and preparation method thereof
  • Nano (ti,m)c solid solution whiskers and preparation method thereof

Examples

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preparation example Construction

[0029] The method for preparing nano (Ti, M)C solid solution whiskers of the present invention includes the following steps:

[0030] (1) Raw material allocation

[0031] The raw materials for the preparation of nano-(Ti, M)C solid solution whiskers include (Ti, M)C component precursors, halogenating agents and catalysts required for the whisker synthesis reaction; wherein the component Ti precursor raw materials are metatitanic acid The precursor material of component C is glucose; the precursor material of component M is a soluble salt of at least one metal element among W, Mo, V, Cr, Ta, and Nb; the halogenating agent is sodium chloride , Potassium chloride, calcium chloride, barium chloride, lithium chloride, or any two mixtures. The catalyst is one of soluble nickel salt, soluble cobalt salt and soluble iron salt.

[0032] The quality of the precursor raw materials of the components Ti, C, and M is calculated and weighed according to the weight percentage of Ti, M and C in cla...

Embodiment 1

[0040] Dissolve 19.2g of metatitanic acid, 5.02g of ammonium metatungstate, 18.94g of glucose, 4.79g of sodium chloride and 2.05g of cobalt chloride in 250ml of distilled water and stir to obtain a precursor solution; 2) Combine the precursors The solution was placed in a blast drying oven and dried at 60°C for 5 hours to obtain a fluffy precursor mixture; 3) The precursor mixture was placed in a tube furnace, under Ar gas protection, at 1100°C Carbothermic reaction was carried out after holding for 4h to obtain unpurified nano-(Ti, 40W)C whiskers; 4) The unpurified nano-(Ti, 40W)C whiskers were burnt in the air at 400℃ for 4h to decarburize, and then passed Washing, centrifugation to separate and remove the particulate residue, and finally drying to obtain nano-(Ti, 40W)C whiskers with a whisker diameter of less than 100nm.

[0041] figure 1 This is the XRD pattern of the (Ti, 40W)C whisker prepared in Example 1. The prior art shows that in the range of 20-90°, pure TiC has typ...

Embodiment 2

[0044] Dissolve 18.4g of metatitanic acid, 0.13g of ammonium metavanadate, 14.92g of glucose, 9.17g of potassium chloride and 7.38g of nickel chloride in 250ml of distilled water, and stir to obtain a precursor solution; 2) Combine the precursors The solution was placed in a blast drying box and dried at 80°C for 4 hours to obtain a fluffy precursor mixture; 3) The precursor mixture was placed in a carbon tube furnace, under Ar gas protection, at 1300°C Carbothermic reaction is carried out after holding for 1h to obtain unpurified nano-(Ti, 0.1V)C whiskers; 4) The unpurified nano-(Ti, 0.1V)C whiskers are burnt in the air at 350℃ for 6h to decarburize, Then the granular residues are separated and removed by washing and centrifugation, and finally dried to obtain nano-(Ti, 0.1V)C whiskers with a whisker diameter of less than 100nm.

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Abstract

The invention discloses a nano (Ti, M) C solid solution crystal whisker and a preparation method thereof. The nano (Ti, M) C solid solution crystal whisker is prepared from the following components: 40-79.9% of Ti, 0.1-40% of M and the balance of C, wherein M is at least one of W, Mo, V, Cr, Ta and Nb. Preparation raw materials comprise a component precursor of (Ti, M) C, a halogenating agent and a catalyst. The preparation method comprises the following steps: preparing a precursor mixed solution from all raw materials with distilled water, and drying so as to obtain precursor mixed powder; putting the precursor mixed powder into a reaction furnace, performing carbon-thermal reaction at 1100-1300 DEG C, firing the obtained nano (Ti, M) C solid solution crystal whisker for 4-6 hours at 350-400 DEG C in the presence of air for decarbonization, washing, performing eccentric separation, and finally drying, thereby obtaining the nano (Ti, M) C solid solution crystal whisker. The nano (Ti, M) C solid solution crystal whisker can be used as a nano ceramic phase crystal whisker toughening reinforcing metal based and ceramic based composite material, and is in good interface combination with a substrate.

Description

Technical field [0001] The invention relates to a titanium carbide whisker material, in particular to a nano (Ti, M)C solid solution whisker and a preparation method thereof, and belongs to the technical field of ceramic phase whisker materials. Background technique [0002] Titanium carbide (TiC) whiskers have the advantages of higher melting point, hardness, modulus, etc., and are mainly used to prepare whisker-reinforced metal matrix, ceramic matrix and other composite materials to improve the strength, toughness and wear resistance of the material. , Has a wide range of uses in the automotive, electronics, machinery, metallurgy, aerospace, new materials and other industrial fields. However, the poor interface between TiC whiskers and the matrix material is still a technical bottleneck hindering its industrial application. This interface bonding is closely related to the solubility, wettability, interface reactivity, and phase compatibility (such as thermal expansion coeffici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/36C30B29/62C30B1/10
CPCC30B1/10C30B29/36C30B29/62
Inventor 金永中张正权尹植王睿贤张永强
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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