Preparation and Properties of Foamable Ni-GNP/AlSi12 Precursor Materials

Arif Uzun

Makale detayları

Preparation and Properties of Foamable Ni-GNP/AlSi12 Precursor Materials

Yazarlar:

Arif Uzun

Yayıncı:

Kastamonu University

Ana Başlıklar:

Malzeme Tasarım ve Davranışları

Dergi:

Kastamonu Üniversitesi Mühendislik ve Fen Bilimleri Dergisi Vol.10 Issue 2, pp.95-104

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001334637

pISSN:

2667-8209

Anahtar kelimeler:

Özet:

 In this study, nickel-coated graphene nanoplatelets reinforced AlSi12 precursor materials were produced by powder metallurgy method. For this process, Ni-GNP particles were added to the matrix material AlSi12 powders at different ratios 0, 0.4, 0.8 and 1.2 by weight. Then, the mixed powders were cold compressed and extruded at different ratios, and foamable precursor samples with diameters of 6 and 12 mm were produced. Microstructural analyses, density measurements and microhardness tests were carried out to evaluate the effects of Ni-GNPs on the properties of foamable precursor materials. Microstructure and surface analysis of Ni-GNPAlSi12 precursor materials showed high density, uniform distribution of Ni, localized Si phases and surface oxidation due to reactivity of aluminum. It was revealed that the addition of Ni-GNP led to the formation of Al-Ni intermetallic phases, reduced the Al peak intensity and strengthened the graphene bond with the Al matrix. The relative density increased with increasing extrusion ratio, higher Ni-GNP content decreased the relative density but improved it significantly after extrusion. The maximum hardness was achieved in the precursor materials with the optimum graphene content of 0.4 wt, while higher amounts led to aggregation, increased porosity and decreased hardness.

 In this study, nickel-coated graphene nanoplatelets reinforced AlSi12 precursor materials were produced by powder metallurgy method. For this process, Ni-GNP particles were added to the matrix material AlSi12 powders at different ratios 0, 0.4, 0.8 and 1.2 by weight. Then, the mixed powders were cold compressed and extruded at different ratios, and foamable precursor samples with diameters of 6 and 12 mm were produced. Microstructural analyses, density measurements and microhardness tests were carried out to evaluate the effects of Ni-GNPs on the properties of foamable precursor materials. Microstructure and surface analysis of Ni-GNPAlSi12 precursor materials showed high density, uniform distribution of Ni, localized Si phases and surface oxidation due to reactivity of aluminum. It was revealed that the addition of Ni-GNP led to the formation of Al-Ni intermetallic phases, reduced the Al peak intensity and strengthened the graphene bond with the Al matrix. The relative density increased with increasing extrusion ratio, higher Ni-GNP content decreased the relative density but improved it significantly after extrusion. The maximum hardness was achieved in the precursor materials with the optimum graphene content of 0.4 wt, while higher amounts led to aggregation, increased porosity and decreased hardness.

 In this study, nickel-coated graphene nanoplatelets reinforced AlSi12 precursor materials were produced by powder metallurgy method. For this process, Ni-GNP particles were added to the matrix material AlSi12 powders at different ratios 0, 0.4, 0.8 and 1.2 by weight. Then, the mixed powders were cold compressed and extruded at different ratios, and foamable precursor samples with diameters of 6 and 12 mm were produced. Microstructural analyses, density measurements and microhardness tests were carried out to evaluate the effects of Ni-GNPs on the properties of foamable precursor materials. Microstructure and surface analysis of Ni-GNPAlSi12 precursor materials showed high density, uniform distribution of Ni, localized Si phases and surface oxidation due to reactivity of aluminum. It was revealed that the addition of Ni-GNP led to the formation of Al-Ni intermetallic phases, reduced the Al peak intensity and strengthened the graphene bond with the Al matrix. The relative density increased with increasing extrusion ratio, higher Ni-GNP content decreased the relative density but improved it significantly after extrusion. The maximum hardness was achieved in the precursor materials with the optimum graphene content of 0.4 wt, while higher amounts led to aggregation, increased porosity and decreased hardness.

 Bu çalışmada toz metalurjisi yöntemi ile nikel kaplı grafen nanoplakçıklar ile takviyelendirilmiş AlSi12 öncü malzemeler üretilmiştir. Bu işlem için farklı oranlarda ağırlıkça 0, 0.4, 0.8 ve 1.2 Ni-GNP parçacıkları matris malzemesi AlSi12 tozlarına ilave edilmiştir. Akabinde karışım tozlar soğuk olarak sıkıştırılmış ve farklı oranlarda ekstrüzyon işlemine tabi tutulmuş ve 6 ve 12 mm çaplara sahip köpürebilir öncü numuneler üretilmiştir. Ni-GNPlerin köpürebilir öncü malzemelerin özellikleri üzerindeki etkilerini değerlendirmek için mikro yapısal analizler, yoğunluk ölçümleri ve mikro sertlik testleri gerçekleştirildi. Ni-GNPAlSi12 öncü malzemelerin mikro yapısı ve yüzey analizi, yüksek yoğunluk, Ninin düzgün dağılımı, lokalize Si fazları ve alüminyumun reaktifliğinden dolayı yüzey oksidasyonunu gösterdi. Ni-GNP eklenmesinin Al-Ni intermetalik fazların oluşumuna yol açtığını, Al pik yoğunluğunu azalttığını ve grafen bağını Al matrisiyle güçlendirdiğini ortaya koydu. Artan ekstrüzyon oranı ile birlikte bağıl yoğunluk artmış, daha yüksek Ni-GNP içeriği bağıl yoğunluğu azaltmış ancak ekstrüzyondan sonra önemli ölçüde iyileştirmiştir. Optimum grafen içeriğinin 0,4 ağırlıkta olmasıyla öncü malzemelerde maksimum sertlik elde edilirken, daha yüksek miktarlar kümeleşmeye, gözenekliliğin artmasına ve sertliğin azalmasına yol açmıştır.

Makale detayları

Preparation and Properties of Foamable Ni-GNP/AlSi12 Precursor Materials

Yazarlar:

Arif Uzun

Yayıncı:

Kastamonu University

Ana Başlıklar:

Malzeme Tasarım ve Davranışları

Dergi:

Kastamonu Üniversitesi Mühendislik ve Fen Bilimleri Dergisi Vol.10 Issue 2, pp.95-104

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001334637

pISSN:

2667-8209

AlSi12

Ni-GNP

Powder metallurgyAlSi12

Ni-GNP

toz metalurjisi

mikroyapı analizi

Sayı

Makale detayları

Preparation and Properties of Foamable Ni-GNP/AlSi12 Precursor Materials

Yazarlar: Arif Uzun

Yayıncı: Kastamonu University

Ana Başlıklar: Malzeme Tasarım ve Davranışları

Dergi: Kastamonu Üniversitesi Mühendislik ve Fen Bilimleri Dergisi Vol.10 Issue 2, pp.95-104

Belge Tipi: Makale

Yayın Tarihi: 12/2024

Belge Dili: İngilizce

Document ID (Org No.): 2001334637

pISSN: 2667-8209

AlSi12

Ni-GNP

Powder metallurgyAlSi12

Ni-GNP

toz metalurjisi

mikroyapı analizi

Sayı

Yazarlar:

Arif Uzun

Yayıncı:

Kastamonu University

Ana Başlıklar:

Malzeme Tasarım ve Davranışları

Dergi:

Kastamonu Üniversitesi Mühendislik ve Fen Bilimleri Dergisi Vol.10 Issue 2, pp.95-104

Belge Tipi:

Makale

Yayın Tarihi:

12/2024

Belge Dili:

İngilizce

Document ID (Org No.):

2001334637

pISSN:

2667-8209