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Journals / Mühendis ve Makina / 2026 / Sayı: 718

Investigation of the Microstructure and Mechanical Properties of Al7075-Si3N4 Composites Produced by Powder Metallurgy and Hot Pressing

Toz Metalürjisi ve Sıcak Preslemeyle Üretilen Al7075-Si3N4 Kompozitlerin Mikroyapısının ve Mekanik Özelliklerinin İncelenmesi

Aleyna Taşkın(ONDOKUZ MAYIS UNIVERSITY, FACULTY OF ENGINEERING)0000-0002-8308-9957
Elif Işık(SIVAS SCIENCE AND TECHNOLOGY UNIVERSITY)0000-0001-8289-9512
Mahmut Can Şenel(ONDOKUZ MAYIS ÜNİVERSİTESİ)0000-0001-7897-1366
Pages
1–22
Publication Date
2025-04-07
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

As a result, it was determined that 9% Si3N4 addition to the Al7075 matrix intensified the microstructure of the composite and improved its mechanical properties.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, Si3N4 was reinforced into the Al7075 matrix at different rates (1, 3, 6, 9, and 12% by weight) by powder metallurgy and hot pressing methods.
📊
Key Findings & Data:As a result of the tests, the highest density (2.65 g/cm3), Vickers hardness (205 HV), compressive strength (344 MPa), and the lowest porosity rate (7.5%) were obtained in Al7075-9Si3N4 composite.
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Conclusion & Impact:As a result, it was determined that 9% Si3N4 addition to the Al7075 matrix intensified the microstructure of the composite and improved its mechanical properties.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Toz metalürjisi · Al7075 alaşımı · Si3N4

Abstract

In this study, Si3N4 was reinforced into the Al7075 matrix at different rates (1, 3, 6, 9, and 12% by weight) by powder metallurgy and hot pressing methods. The effect of the addition ratio on the microstructure and mechanical (density, porosity ratio, Vickers hardness and compressive strength) of the fabricated composites was examined. As a result of the tests, the highest density (2.65 g/cm3), Vickers hardness (205 HV), compressive strength (344 MPa), and the lowest porosity rate (7.5%) were obtained in Al7075-9Si3N4 composite. In microstructure examinations, it was detected that the reinforcement particles were distributed nearly homogeneously in the matrix at 9% Si3N4 contribution rate. As a result, it was determined that 9% Si3N4 addition to the Al7075 matrix intensified the microstructure of the composite and improved its mechanical properties.

Özet

Yapılan bu çalışmada toz metalürjisi ve sıcak presleme yöntemleriyle Al7075 matrise farklı oranlarda (ağırlıkça %1, 3, 6, 9 ve 12) Si3N4 takviye edilmiştir. Katkı oranının üretilen kompozitlerin mikroyapılarına ve mekanik özelliklerine (yoğunluk, gözeneklilik oranı, Vickers sertliği ve basma dayanımı) olan etkisi incelenmiştir. Yapılan testler sonucunda en yüksek yoğunluk (2,65 g/cm3), Vickers sertliği (205 HV), basma dayanımı (344 MPa) ve en düşük gözeneklilik oranı (%7,5) Al7075-9Si3N4 kompozitte elde edilmiştir. Mikroyapı incelemeleri sonucunda ise %9Si3N4 katkı oranında takviye partiküllerinin matris içerisinde homojene yakın bir şekilde dağıldığı belirlenmiştir. Sonuç olarak Al7075 matrise %9Si3N4 katkısının kompozitin mikroyapısını yoğunlaştırdığı ve mekanik özelliklerini iyileştirdiği tespit edilmiştir.

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Cite This Article

Taşkın, A., Işık, E., Şenel, M. C. (2025). Investigation of the Microstructure and Mechanical Properties of Al7075-Si3N4 Composites Produced by Powder Metallurgy and Hot Pressing. Mühendis ve Makina, Sayı: 718, 1–22. https://doi.org/10.46399/muhendismakina.1409791

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