Investigation of the Bonding Mechanism of Al Powder Particles through Pulse Current Sintering Technology
Abstract
:1. Introduction
2. Experimental Procedure
3. Results and Discussion
3.1. The Ansys Finite Element Simulation
3.1.1. Finite Element Model
3.1.2. Structure Model
3.1.3. Thermoelectric Coupling Model
3.1.4. Boundary Conditions and Initial Conditions
- (1)
- Structural Boundary Conditions
- (2)
- Temperature Boundary Condition
3.1.5. Simulation Results
3.2. Interfacial Micro-Structure Feature
3.3. Nano-Indentation Property
3.4. Development of an Innovative Powder Sintering Technology
4. Conclusions
- (1)
- The current distribution in pulse current sintering demonstrates that the pulse current flows preferentially through the particle surface. The pulse current density of the particle surface reaches 3.48 × 105 A/m2 instantly, while the current density of the particle center is only 8187 A/m2 at the initial stage, which is the main difference between pulse current sintering and traditional powder metallurgy sintering.
- (2)
- Under the action of pulse current sintering, the gap arc, heat generation, melting, and connection processes occurred in sequence, which can be attributed to the change in the contact mode between Al particles. The micro-structure characteristics of EBSD and TEM also confirm the densification mechanism of the pulse current sintering technology.
- (3)
- An innovative powder sintering technology, the high-frequency pulse current sintering technique, is proposed based on the development of high-frequency welding.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Element | Al | Zn | Mg | Cu | Cr | Fe | Si | Mn |
---|---|---|---|---|---|---|---|---|
Content | 89.25 | 5.53 | 2.67 | 1.75 | 0.26 | 0.19 | 0.17 | 0.082 |
Zone 1 | /GPa | /μm | R2 | Yield Strength/MPa |
---|---|---|---|---|
1 | 0.630 | 0.511 | 0.984 | 210.00 |
2 | 0.532 | 0.954 | 0.976 | 177.33 |
3 | 0.682 | 0.426 | 0.985 | 227.33 |
4 | 0.583 | 0.653 | 0.988 | 194.33 |
5 | 0.675 | 0.546 | 0.936 | 225.00 |
6 | 0.666 | 0.311 | 0.959 | 222.00 |
Average | 0.6385 | 212.83 | ||
Zone 2 | /GPa | /μm | R2 | Yield Strength/MPa |
1 | 0.519 | 0.747 | 0.999 | 173.00 |
3 | 0.652 | 0.433 | 0.942 | 217.33 |
5 | 0.643 | 0.419 | 0.952 | 214.33 |
6 | 0.535 | 0.766 | 0.954 | 178.33 |
7 | 0.616 | 0.512 | 0.964 | 205.33 |
8 | 0.548 | 0.853 | 0.995 | 182.67 |
Average | 0.5855 | 195.17 | ||
Zone 3 | /GPa | /μm | R2 | Yield Strength/MPa |
1 | 0.617 | 0.711 | 0.992 | 205.67 |
2 | 0.536 | 0.927 | 0.980 | 178.67 |
3 | 0.576 | 0.729 | 0.992 | 192.00 |
4 | 0.653 | 0.437 | 0.976 | 217.67 |
5 | 0.590 | 0.615 | 0.991 | 196.67 |
6 | 0.599 | 0.727 | 0.981 | 199.67 |
Average | 0.5955 | 198.50 |
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Lv, Z.; Liu, R. Investigation of the Bonding Mechanism of Al Powder Particles through Pulse Current Sintering Technology. Coatings 2024, 14, 759. https://doi.org/10.3390/coatings14060759
Lv Z, Liu R. Investigation of the Bonding Mechanism of Al Powder Particles through Pulse Current Sintering Technology. Coatings. 2024; 14(6):759. https://doi.org/10.3390/coatings14060759
Chicago/Turabian StyleLv, Zhou, and Ruifeng Liu. 2024. "Investigation of the Bonding Mechanism of Al Powder Particles through Pulse Current Sintering Technology" Coatings 14, no. 6: 759. https://doi.org/10.3390/coatings14060759