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Laser sintering synthesis method of ceramic-particle-reinforced nickel-aluminum-based composite

A composite material and laser sintering technology, which is applied in the field of material processing, can solve problems such as difficulty in adding reinforcements, poor interface bonding, and easy segregation of reinforcements, and achieve the effects of small size, improved comprehensive performance, and firm bonding

Inactive Publication Date: 2014-05-07
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have experienced the external mixing process of reinforcements during the preparation process, which belongs to the partial introduction of reinforcements, and this process will inevitably lead to a certain degree of particle surface pollution, and the reinforcements are mostly particles or second-phase hard points. , so there are disadvantages such as poor interfacial bonding, difficulty in adding reinforcements, complex process, high cost, and easy segregation of reinforcements.

Method used

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  • Laser sintering synthesis method of ceramic-particle-reinforced nickel-aluminum-based composite
  • Laser sintering synthesis method of ceramic-particle-reinforced nickel-aluminum-based composite
  • Laser sintering synthesis method of ceramic-particle-reinforced nickel-aluminum-based composite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mix nickel powder and aluminum powder according to the atomic ratio Ni:Al=3:1, and add 0.5wt% tungsten concentrate ore powder of the total mass of nickel-aluminum mixed powder, then put it into a ball mill tank and place it on a ball mill for 4 hours , the ball milling speed is 100rpm, and the mixed powder is obtained after ball milling;

[0032] (2) using such as figure 1 As shown, the compact mold with a cylindrical cavity is composed of a stripping seat and a female mold. The mixed powder is placed in the cavity, and the cylindrical compact is pressed by a pressure rod under a pressure of 60KN. The height of the compact is 12mm, the relative density is 88%;

[0033] (3) Place the compact on the CNC machine tool, the CNC machine tool and CO 2Connect the laser processing machine, adjust the spindle of the CNC machine tool so that the diameter of the spot is the same as the diameter of the compact when the laser beam is irradiated vertically, and start the CO 2 L...

Embodiment 2

[0037] (1) Mix nickel powder and aluminum powder according to the atomic ratio Ni:Al=3:1, and add tungsten concentrate ore powder with a total mass of nickel-aluminum mixed powder of 1wt%, and then put it in a ball mill tank and place it on a ball mill for 5 hours. The ball milling speed is 150rpm, and a uniformly mixed powder is obtained after ball milling;

[0038] (2) using such as figure 1 As shown, the compact mold with a cylindrical cavity includes a knockout seat and a female mold. The mixed powder is placed in the cavity and pressed into a cylindrical compact with a pressure rod under a pressure of 70KN. The height of the compact is 15mm, the relative density is 88%;

[0039] (3) Place the compact on the CNC machine tool, the CNC machine tool and CO 2 Connect the laser processing machine, adjust the spindle of the CNC machine tool so that the diameter of the spot is the same as the diameter of the compact when the laser beam is irradiated vertically, and start the CO...

Embodiment 3

[0043] (1) Mix nickel powder and aluminum powder according to the atomic ratio Ni:Al=3:1, and add tungsten concentrate ore powder with a total mass of nickel-aluminum mixed powder of 2wt%, and then put it in a ball mill tank and place it on a ball mill for 6 hours. The ball milling speed is 200rpm, and a uniformly mixed powder is obtained after ball milling;

[0044] (2) using such as figure 1 As shown, the compact mold with a cylindrical cavity includes a knockout seat and a female mold. The mixed powder is placed in the cavity and pressed into a cylindrical compact with a pressure rod under a pressure of 80KN. The height of the compact is 18mm, the relative density is 88%;

[0045] (3) Place the compact on the CNC machine tool, the CNC machine tool and CO 2 Connect the laser processing machine, adjust the spindle of the CNC machine tool so that the diameter of the spot is the same as the diameter of the compact when the laser beam is irradiated vertically, and start the CO...

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Abstract

The invention belongs to the technical field of material processing and particularly relates to a laser sintering synthesis method of a ceramic-particle-reinforced nickel-aluminum-based composite. The technical scheme includes that the laser sintering synthesis method includes the steps: mixing nickel powder with aluminum powder according to the atomic ratio of Ni to Al of 3:1, adding tungsten concentrate powder accounting for 0.5-2wt% of the total weight of nickel-aluminum mixed powder, performing ball milling to obtain uniformly-mixed mixed powder, compacting the mixed powder to a cylindrical compact, placing the compact on a numerically-controlled machine tool, starting a CO2 laser machine with the laser powder of 900-1200W for laser radiation for 10-20s, and lighting the surface of the compact to enable the compact to generate self-propagating reaction, so that the ceramic-particle-reinforced nickel-aluminum-based composite by laser sintering synthesis is obtained. According to the laser sintering synthesis method, matrix reaction, reinforced phase formation and metal-based composite preparation are combined together, and the reinforced ceramic phase subjected to in-situ synthesis enables high-temperature mechanical properties of a nickel-aluminum intermetallic compound to be obviously improved and enhanced.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a laser sintering synthesis method of a ceramic particle reinforced nickel-aluminum matrix composite material. Background technique [0002] Laser has the characteristics of monochromaticity, coherence, directionality, and high energy density. As a heat source for combustion synthesis, it has the characteristics of easy control, non-contact, pollution-free, high heating and cooling rates, and easy access to non-equilibrium phases and multi-defect structures. Easy to synthesize has the advantages of some special functional materials, so it is widely used in the processing of metal matrix composites. Laser-induced self-propagating high-temperature synthesis technology uses the high energy density of laser to ignite the material to be synthesized through a specific medium (window), and then maintains self-propagation by the latent heat released by the synthes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C1/05
Inventor 李刚胡文全安亚君罗崇辉
Owner LIAONING TECHNICAL UNIVERSITY
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