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Ti-MAX-based open ceramic for TiAl-based alloy filtration and preparation method thereof

A technology based on alloys and ceramics, which is applied in the field of Ti-MAX-based opening ceramics for TiAl-based alloy filtration and its preparation. Controllable layer structure, anti-pollution, high electrical and thermal conductivity effects

Inactive Publication Date: 2019-02-19
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the strong reactivity of TiAl alloy in the molten state, the TiAl alloy solution is very easy to react with traditional filter ceramic substrates or coating materials. Alloy reaction, not only does not achieve the effect of filtering inclusions but pollutes the alloy
In addition, the coating prepared by cold spraying technology is easy to peel off under the thermal shock of high temperature melt, which will become a new source of inclusions, which greatly limits the stability of filter ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A Ti-MAX-based opening ceramic for TiAl-based alloy filtration and a preparation method thereof. The preparation method described in this embodiment is:

[0030] Step 1, using 50-58 parts by mass of Ti-MAX fine powder, 29-36 parts by mass of carbon black fine powder and 12-15 parts by mass of carbon-containing binder as raw materials, with 35-45 parts by mass of deionized water , 0.2 to 2 parts by mass of polypropylene glycol, 0.2 to 1.2 parts by mass of polycarboxylate water reducer, 0.2 to 1.5 parts by mass of polymethylcellulose sodium and 0.2 to 1.5 parts by mass of ammonium lignosulfonate as additives, The raw materials and the additives are placed in a ball mill jar and mixed for 1-3 hours to obtain slurry I.

[0031] Step 2. Place 100 parts by mass of Ti-MAX fine powder, 35 to 45 parts by mass of deionized water, 0.2 to 1.2 parts by mass of polycarboxylate water reducer and 0.2 to 1.5 parts by mass of polymethylcellulose sodium Mix in a ball mill jar for 4-6 ho...

Embodiment 2

[0039] A Ti-MAX-based opening ceramic for TiAl-based alloy filtration and a preparation method thereof. The preparation method described in this embodiment is:

[0040] Step 1, using 57-66 parts by mass of Ti-MAX fine powder, 25-30 parts by mass of carbon black fine powder and 6-13 parts by mass of carbon-containing binder as raw materials, with 43-53 parts by mass of deionized water , 0.2 to 2 parts by mass of polypropylene glycol, 0.2 to 1.2 parts by mass of polycarboxylate water reducer, 0.2 to 1.5 parts by mass of polymethylcellulose sodium and 0.2 to 1.5 parts by mass of ammonium lignosulfonate as additives, The raw materials and the additives are placed in a ball mill jar and mixed for 1-3 hours to obtain slurry I.

[0041] Step 2. Place 100 parts by mass of Ti-MAX fine powder, 43 to 53 parts by mass of deionized water, 0.2 to 1.2 parts by mass of polycarboxylate water reducer and 0.2 to 1.5 parts by mass of polymethylcellulose sodium Mix in a ball mill jar for 4-6 hou...

Embodiment 3

[0049] A Ti-MAX-based opening ceramic for TiAl-based alloy filtration and a preparation method thereof. The preparation method described in this embodiment is:

[0050] Step 1, using 65-72 parts by mass of Ti-MAX fine powder, 21-26 parts by mass of carbon black fine powder and 4-9 parts by mass of carbon-containing binder as raw materials, with 52-62 parts by mass of deionized water , 0.2 to 2 parts by mass of polypropylene glycol, 0.2 to 1.2 parts by mass of polycarboxylate water reducer, 0.2 to 1.5 parts by mass of polymethylcellulose sodium and 0.2 to 1.5 parts by mass of ammonium lignosulfonate as additives, The raw materials and the additives are placed in a ball mill jar and mixed for 1-3 hours to obtain slurry I.

[0051] Step 2. Place 100 parts by mass of Ti-MAX fine powder, 52 to 62 parts by mass of deionized water, 0.2 to 1.2 parts by mass of polycarboxylate water reducer and 0.2 to 1.5 parts by mass of polymethylcellulose sodium Mix in a ball mill jar for 4-6 hour...

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Abstract

The invention relates to Ti-MAX-based open ceramic for TiAl-based alloy filtration and a preparation method thereof. The preparation method includes: mixing well Ti-MAX fine powder, carbon black finepowder, a carbon-containing binder, deionized water, polypropylene glycol, a polycarboxylate superplasticizer, polymethyl cellulose sodium and ammonia lignosulfonate to obtain slurry I; mixing well Ti-MAX fine powder, deionized water, polycarboxylate superplasticizer and polymethyl cellulose sodium to obtain slurry II; impregnating a polyurethane foam baseplate in the slurry I, taking out, extruding, curing, impregnating in the slurry II, curing, heating to 1100-1300 DEG C in a weak oxidation protective atmosphere, holding the temperature, heating to 1400-1600 DEG C, holding the temperature toattain Ti-MAX-based open ceramic for TiAl-based alloy filtration. The ceramic prepared herein has high bonding strength between an in-situ coating and a base, excellent thermal shock resistance and capability of effectively avoiding adverse influence of new inclusions due to hot stripping, and interaction can be effectively avoided in order to prevent TiAl-based alloy pollution.

Description

technical field [0001] The invention belongs to the technical field of opening ceramics for filtering. In particular, it relates to a Ti-MAX-based opening ceramic for TiAl-based alloy filtering and a preparation method thereof. Background technique [0002] In the process of smelting TiAl-based alloys in a crucible vacuum induction furnace, due to the strong reactivity of the molten TiAl-based alloys, the crucible matrix elements will dissolve into the TiAl-based alloys to form inclusions. Inclusions are a significant challenge. In recent years, in order to effectively remove fine inclusions to prepare high-purity steel castings, many researchers have proposed to prepare "second-generation filter ceramics" (active coating filter ceramics) by spraying oxide coatings on the surface of filter ceramic substrates. The main mechanism of active adsorption of inclusions is to form an effective collision contact with the active coating through inclusions, form solid products throug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/58C04B35/622C04B35/634C04B35/636C04B35/66C04B38/06B01D39/20
CPCB01D39/2068C04B35/5618C04B35/58C04B35/622C04B35/634C04B35/63488C04B35/6365C04B35/66C04B38/0615
Inventor 陈俊峰肖俊李蔡伏玲魏耀武韩兵强鄢文李楠
Owner WUHAN UNIV OF SCI & TECH
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