Powder metal Al2O3 reinforced Mg5Sn matrix composites: Production and characterization

Öz

In this study, Mg5Sn-xAl2O3 composite materials were produced by powder metallurgy (PM) method by adding different proportions of Al2O3 into the Mg-Sn matrix containing 5% Sn by weight. A new mixing technique was used to prevent the negative effects of the high reactivity of Mg powders in production. The production of samples from the prepared powder mixtures was carried out by hot pressing technique. The produced samples were characterized by density measurements, microstructure examinations and mechanical tests. Measured density values are obtained very close to the theoretical density. Microstructure investigations showed that the alumina reinforcement was homogeneously distributed in the microstructure. Increasing Al2O3 reinforcement ratio provided significant increases in hardness and tensile strength values.

Anahtar Kelimeler

• Magnesium-tin matrix
• Al2O3 reinforcement
• composite material
• microstructure
• mechanical properties

Proje Numarası

BAP-MMF.2017.00.007

Toz metal Al2O3 takviyeli Mg5Sn matrisli kompozitler: Üretim ve karakterizasyon

Öz

Bu çalışmada, ağırlıkça %5 Sn içeren Mg-Sn matris içerisine farklı oranlarda Al2O3 ilave edilerek toz metalurjisi (TM) yöntemiyle Mg5Sn-xAl2O3 kompozit malzemeler üretilmiştir. Üretimde Mg tozlarının sahip olduğu yüksek reaktivitenin yol açacağı olumsuzlukları önlemek amacıyla yeni bir karıştırma tekniği kullanılmıştır. Hazırlanan toz karışımlarından numune üretimi sıcak presleme tekniği ile gerçekleştirilmiştir. Üretilen numuneler, yoğunluk ölçümleri, mikroyapı incelemeleri ve mekanik testler ile karakterize edilmiştir. Ölçülen yoğunluk değerleri teorik yoğunluğa oldukça yakın elde edilmiştir. Mikroyapı incelemeleri, alümina takviyesinin mikroyapıda homojen bir şekilde dağıldığını göstermiştir. Artan Al2O3 takviye oranı, sertlik ve çekme dayanımı değerlerinde önemli artışlar sağlamıştır.

Anahtar Kelimeler

• Magnezyum-kalay matrisi
• Al2O3 takviyesi
• kompozit malzeme
• mikroyapı
• mekanik özellikler

Destekleyen Kurum

Bingöl Üniversitesi

Proje Numarası

BAP-MMF.2017.00.007

Teşekkür

Bu çalışmaya, BAP-MMF.2017.00.007 nolu proje ile sağladığı destekten dolayı Bingöl Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi’ne teşekkür ederiz.

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