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A preparation method of high-strength, high-toughness, corrosion-resistant nickel-based composite material and the resulting product

A high-strength, high-toughness, composite material technology, applied in the field of nickel-based composite materials, high-strength, high-toughness, corrosion-resistant nickel-based composite materials and their preparation, to achieve the effects of convenient operation, wide sintering temperature range, and avoiding the occurrence of interface chemical reactions

Active Publication Date: 2021-11-05
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-entropy alloys have high strength, high hardness, excellent wear resistance and corrosion resistance, and excellent temper softening resistance. They are considered to be extremely promising and valuable metal matrix composite particle additive phases, which have not been seen so far. Application of high-entropy alloys as particle additive phases in nickel-based composites

Method used

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  • A preparation method of high-strength, high-toughness, corrosion-resistant nickel-based composite material and the resulting product
  • A preparation method of high-strength, high-toughness, corrosion-resistant nickel-based composite material and the resulting product
  • A preparation method of high-strength, high-toughness, corrosion-resistant nickel-based composite material and the resulting product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step (1): Preparation of high-entropy alloy powders: Co, Cr, Fe, Ni, Mn, Al metal powders with a purity of ≧99.5 wt.% according to (CoCrFeNiMn) 90 Al 10 Weigh, put each metal powder in a ball mill jar, vacuumize the ball mill jar and fill it with argon, and use cyclohexane as a process control agent. According to the conditions of speed: 350 rpm, mass ratio of ball to material: 15:1, time: 120 h, mechanical alloying was carried out to obtain (CoCrFeNiMn) 90 Al 10 High-entropy alloy powder; XRD pattern of high-entropy alloy figure 1 As can be seen from the figure, a face-centered cubic and body-centered cubic two-phase solid solution structure is formed. Powder particle size: 10~30μm.

[0035] Step (2): powder mixing: the (CoCrFeNiMn) prepared in step (1) 90 Al 10 The high-entropy alloy powder and pure nickel powder are loaded into a ball mill jar at a volume ratio of 1:4, and the ball mill jar is evacuated and protected by argon. Mix according to the conditions o...

Embodiment 2

[0039] Prepare bulk nickel-based composite material according to the method of Example 1, the difference is: (CoCrFeNiMn) 90 Al 10 The high-entropy alloy powder and pure nickel powder are loaded into the ball mill jar according to the volume ratio of 1:19.

Embodiment 3

[0041] Prepare bulk nickel-based composite material according to the method of Example 1, the difference is: (CoCrFeNiMn) 90 Al 10 High-entropy alloy powder and pure nickel powder are loaded into ball mill jars according to the volume ratio of 1:9.

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Abstract

The invention discloses a method for preparing a high-strength, high-toughness, corrosion-resistant nickel-based composite material and the resulting product. The composite material is based on (CoCrFeNiMn) 100‑x al x It is a dual-phase high-entropy alloy as the particle additive phase, and pure nickel as the matrix. The high-entropy alloy contains nickel element, which forms a concentration gradient with the nickel matrix, which promotes the full diffusion of nickel atoms between the two phases during the sintering process, and the interface bonding state is good and the bonding strength is high. Based on the metastable feature, the dual-phase high-entropy alloy decomposes under high temperature and pressure conditions to form a reinforcing phase in situ on the nickel substrate. The preparation process of the present invention is simple, the relative density of the obtained composite material is high, the submicron-scale aluminum-rich oxide and the nano-scale solid solution precipitation reinforcement phase are formed in situ, and have comprehensive mechanical properties of high hardness, high strength and excellent plasticity, and Seawater corrosion resistance is good.

Description

technical field [0001] The invention relates to a nickel-based composite material, in particular to a high-strength, high-toughness, corrosion-resistant nickel-based composite material with a dual-phase high-entropy alloy as a particle additive phase and a preparation method thereof, belonging to the technical field of metal composite material preparation. Background technique [0002] Nickel and nickel-based composite materials are an important class of materials with good mechanical, physical and chemical properties. They are mainly used in aviation and aerospace turbine engine parts, followed by corrosion-resistant materials in the petrochemical field. Electronic industry applications include nickel-based Soft magnetic materials, targets, batteries, etc. [0003] At present, most of the additive phases used in nickel-based composites are ceramic phases. The wettability and compatibility of the interface between ceramic particles and the nickel matrix are not good, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/04C22C19/05C22C30/00B22F9/04B22F3/105
CPCB22F3/105B22F9/04B22F2009/043C22C1/10C22C19/058C22C30/00
Inventor 王艳王乃冉王英姿
Owner UNIV OF JINAN
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