scholarly journals Pengaruh Proses Oksidasi Lapisan Metal Matrix Composite pada Substrat SS316

2019 ◽  
Vol 4 (2) ◽  
pp. 277
Author(s):  
Erie Martides ◽  
Candra Dewi Romadhona ◽  
Djoko Hadi Prajitno ◽  
Budi Prawara
Keyword(s):  
Metal Matrix Composite ◽  
Thermal Spray ◽  
Matrix Composite ◽  
High Velocity ◽  
Metal Matrix ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
High Velocity Oxygen Fuel ◽  
Hvof Thermal Spray ◽  
Oxygen Fuel

Material SS316 seringkali digunakan untuk komponen yang bekerja pada temperatur tinggi dengan resiko mengalami oksidasi yang menyebabkan penurunan sifat material dan umur pakai dari komponen. Deposisi Metal Matrix Composite (MMC) NiCr+Cr3C2+Al2O3 dan NiCr+WC12Co+Al2O3 menggunakan metode High Velocity Oxygen Fuel (HVOF) thermal spray coating dengan parameter konstan dilakukan sebagai proses perlakuan pada permukaan SS316 untuk meningkatkan nilai kekerasan dan ketahanan terhadap oksidasi.  Tujuan penelitian ini adalah untuk mengetahui pengaruh proses oksidasi lapisan MMC pada material substrat SS316. Proses oksidasi dilakukan dengan variasi temperatur 500° dan 600°C, penahanan temperatur selama 6 jam, kemudian diteruskan dengan karakterisasi serta perhitungan laju oksidasi. Hasil penelitian menunjukkan spesimen MMC NiCr+Cr3C2+Al2O3 yang dilakukan proses oksidasi pada suhu 500°C memiliki laju oksidasi terendah yaitu 6,67 x 10-7 gram/mm2 jam. 

scholarly journals KETAHANAN MULUR BAJA SUS 304 HASIL PELAPISAN METAL MATRIX COMPOSITE NiCr+ Cr3C2 DENGAN METODA HVOF

2020 ◽  
Vol 26 (1) ◽  
Author(s):  
Muhammad Luthfi Naufal ◽  
Muhammad Waldi ◽  
Djoko Hadi Prajitno
Keyword(s):  
Metal Matrix Composite ◽  
Thermal Spray ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
High Velocity Oxygen Fuel ◽  
Hvof Thermal Spray ◽  
Boiler Tubes ◽  
Oxygen Fuel

KETAHANAN MULUR DAN OKSIDASI SIKLIK BAJA SUS 304 HASIL PELAPISAN METAL MATRIX COMPOSITE NiCr+Cr3C2 DENGAN METODA HVOF. Telah dilakukan proses deposisi Metal Matrix Composite coating 60% NiCr + 30% Cr3C2+ 10% Al2O3 dan 60% NiCr + 40% Cr3C2 dengan menggunakan teknik High Velocity Oxygen Fuel (HVOF) Thermal Spray Coating, pada permukaan baja SUS 304. Tujuan pelapisan untuk meningkatkan ketahanan mulur dan oksidasi siklik dalam aplikasi pipa boiler tubes PLTU. Pengujian creep telah dilakukan pada temperatur 550oC dengan pembebanan sebesar 0.4 σy dan 0.6 σy (yield strength) selama 30240 menit (21 hari). Pengujian oksidasi siklik dengan variasi temperatur 600oC, 700oC dan 800oC selama 1 jam dalam tubes furnace dan pendinginan diluar selama 15 menit dalam 1 siklus dan di lakukan sebanyak 5 siklus. Spesimen coating Metal Matrix Composite (MMC) 3 komponen  merupakan coating yang rekomendasikan dalam aplikasi pipa boiler tubes PLTU merupakan laju mulur yang paling rendah sebesar 0.000148917%/jam. Spesimen coating MMC 3 komponen pada temperatur 600oC memiliki perubahan berat oksida, ketebalan coating, dan senyawa oksida yang terbentuk paling rendah.Kata kunci: SUS 304, HVOF Thermal Spray Coating, Metal Matrix Composite, ketahanan mulur, oksidasi siklik.

Design System of High-Velocity Oxygen Fuel (HVOF) Thermal Spray Coating Based on Computerization

2017 ◽  
Vol 728 ◽  
pp. 105-110
Author(s):  
Vita Susanti ◽  
Erie Martides ◽  
Midriem Mirdanies ◽  
Budi Prawara ◽  
Ant. Ardath Kristi ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Mass Flow ◽  
High Velocity ◽  
Combustion Process ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
High Velocity Oxygen Fuel ◽  
Mass Flow Controller ◽  
Flow Controller ◽  
Oxygen Fuel

Wear and corrosion are problems prevalent in the industrialized world. One way to overcome this matter is the process of coating with a thermal spray coating. The coating process is categorized into two processes based on the heat source, i.e., combustion and electric. One example of combustion process is the high-velocity oxygen fuel (HVOF). The HVOF system which is operated manually has been studied in previous works. Computerized HVOF system is developed and manufactured in this study to improve reproducibility of coating and safety of operator. ATMega16 microcontroller was connected with several sensors (oxygen mass flow controller, nitrogen mass flow controller, propane mass flow controller, and pressure sensor), and Visual Studio.Net 2013 was used to create a graphic user interface (GUI). Based on test results obtained, it was found that the GUI successfully communicated using serial communications and could access the input/output (I/O) required by the microcontroller. Combinaton of gas mass flow controller and pressure sensors result in precise control of oxy-fuel combustion process.

scholarly journals Mikrostruktur dan Karakterisasi Sifat Mekanik Lapisan Cr3C2-NiAl-Al2O3 Hasil Deposisi Dengan Menggunakan High Velocity Oxygen Fuel Thermal Spray Coating

2012 ◽  
Vol 1 (1) ◽  
pp. 1-4
Author(s):  
Edy Riyanto ◽  
Budi Prawara
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Thermal Spray ◽  
Powder Particle ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Powder Particle Size ◽  
High Velocity Oxygen Fuel ◽  
Oxygen Fuel ◽  
Nial Powder

Surface coating processing of industrial component with thermal spray coatings have been applied in many industrial fields. Ceramic matrix composite coating which consists of Cr3C2-Al2O3-NiAl had been carried out to obtain layers of material that has superior mechanical properties to enhance component performance. Deposition of CMC with High Velocity Oxygen Fuel (HVOF) thermal spray coating has been employed. This study aims to determine the effect of powder particle size on the microstructure, surface roughness and hardness of the layer, by varying the NiAl powder particle size. Test results show NiAl powder particle size has an influence on the mechanical properties of CMC coating. Hardness of coating increases and surface roughness values of coating decrease with smaller NiAl particle size.  

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