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Tri-iron aluminide intermetallic compound-titanium nitride ceramic composite and method for preparing same

An intermetallic compound, titanium nitride ceramic technology, applied in the field of composite material science, can solve the problem of small improvement, and achieve the effects of excellent performance, high hardness and comprehensive performance improvement.

Active Publication Date: 2014-03-12
SHANDONG JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alloying and the addition of ceramic phases improve the Fe 3 The comprehensive properties of Al alloys, even so, are still unsatisfactory in some harsh conditions.
Patent No. 200910116604.1 of the Chinese patent "Iron three aluminum intermetallic compound-titanium diboride composite material and preparation method" discloses a main component of Fe 3 Al, TiB 2 The hardness, flexural strength and fracture toughness of the intermetallic compound matrix composites are all improved, but the improvement is small

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: The mass percent (wt%) of each component prepared is: TiN 5%, Fe 3 Al intermetallic compound 95% iron three aluminum intermetallic compound-titanium nitride ceramic composite material

[0017] Firstly, 13.1 kg of iron powder and 81.9 kg of aluminum powder were milled in a ball mill for 50 hours, then 5 kg of TiN powder was added, mixed for 2 hours, dried in vacuum and sieved with a 100-mesh sieve. Put it into a graphite mold for compaction, and then move it together with the mold into a spark plasma sintering (SPS) equipment, raise the temperature to 850°C, use a pressure of 30MPa, and keep it warm for 20min. The sintered blank is cooled to room temperature with the furnace and released from the furnace. The mass percentage (wt%) of the components obtained is: TiN 5%, Fe 3 Al intermetallic compound 95% iron three aluminum intermetallic compound-titanium nitride ceramic composite material.

[0018] After testing, the TiN-Fe prepared above 3 The Al composite...

Embodiment 2

[0019] Example 2: The mass percent (wt%) of each component prepared is: TiN 10%, Fe 3 Fe3Al intermetallic compound-titanium nitride ceramic composite with 90% Al intermetallic compound

[0020] First, 74.6 kg of iron powder and 15.4 kg of aluminum powder were ball milled in a ball mill for 40 hours, then 10 kg of TiN powder was added, mixed for 4 hours, and then sieved with a 100-mesh sieve after vacuum drying. Put it into a graphite mold for compaction, and then move it together with the mold into a spark plasma sintering (SPS) equipment, raise the temperature to 870°C, apply a pressure of 35MPa, and keep it warm for 15min. The sintered blank is cooled to room temperature with the furnace and released from the furnace. The mass percentage (wt%) of the components obtained is: TiN 10%, Fe 3 Al intermetallic compound 90% iron three aluminum intermetallic compound - titanium nitride ceramic composite material.

[0021] After testing, the TiN-Fe prepared above 3 The Al composit...

Embodiment 3

[0022] Example 3: Preparation of iron-tri-aluminum intermetallic compound-titanium nitride ceramic composite material

[0023] 71.6 kg of iron powder, 13.4 kg of aluminum powder and 15 kg of TiN powder were added to the ball mill at the same time and ball milled for 70 hours. After vacuum drying, they were screened with a 100-mesh sieve. Put it into a graphite mold for compaction, and then move it together with the mold into a spark plasma sintering (SPS) device, raise the temperature to 900°C, and use a pressure of 40MPa to keep it warm for 10 minutes. The sintered blank is cooled with the furnace to room temperature and released from the furnace, and demolded to obtain the iron-tri-aluminum intermetallic compound-titanium nitride ceramic composite material.

[0024] After testing, the TiN-Fe prepared above 3 The hardness of the Al composite material is 91 (HRC), and the bending strength is 1000MPa.

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Abstract

The invention discloses an tri-iron aluminide intermetallic compound-titanium nitride ceramic composite which takes TiN, iron powder and aluminium powder as raw materials, a Fe3Al alloy powder material is prepared through using a mechanical alloying technology, is carried out ball milling and mixing with TiN fine powder to process powder, and is subjected to hot pressed sintering under a protective atmosphere or a vacuum condition to form, wherein the composite comprises the following compositions by weight percent: 5-15% of TiN, and 85-95% of Fe3Al intermetallic compound. The characteristics of high strength and high hardness of a titanium nitride ceramic material are utilized to make up the defect of the high-temperature property of the intermetallic compound, and the intermetallic compound composite which is reasonable in cost performance, and has excellent performance and advanced practicability is produced, so that relatively wide applications of the intermetallic compound composite are created.

Description

technical field [0001] The invention belongs to the field of composite material science, and particularly relates to a composite material with iron-three-aluminum intermetallic compound as a matrix and titanium nitride ceramics as a reinforcement, that is, iron-three-aluminum intermetallic compound-titanium nitride ceramic composite material and its preparation method. Background technique [0002] Fe 3 Al-based intermetallic compounds have the advantages of good high-temperature strength, excellent oxidation resistance and corrosion resistance, small specific gravity and low cost, and are expected to be widely valued as a new type of high-temperature structural material, but they are brittle at room temperature. And the sharp decrease in strength when the temperature exceeds 600 °C hinders its practical application. For this reason, many researchers try to solve the molding and application problems by adding a second phase. In recent years, people have adopted alloying s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C32/00C22C38/14C22C33/02C22C1/05
Inventor 庞来学唐新德
Owner SHANDONG JIAOTONG UNIV