scholarly journals MODIFIKASI PENGUJIAN KEKUATAN LEKAT LAPISAN HVOF THERMAL SPRAY DENGAN SERBUK WC PADA NOSEL ROKET

2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Bondan T Sofyan ◽  
Haposan J Pardede ◽  
Marizki Stefano ◽  
Edi Sofyan
2019 ◽  
Vol 4 (2) ◽  
pp. 277
Author(s):  
Erie Martides ◽  
Candra Dewi Romadhona ◽  
Djoko Hadi Prajitno ◽  
Budi Prawara

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. 


Coatings ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 290
Author(s):  
J. Mora ◽  
P. García ◽  
R. Muelas ◽  
A. Agüero

Weather hazards, in particular icing conditions, are an important contributing factor in aviation accidents and incidents worldwide. Many different anti-icing strategies are currently being explored to find suitable long-lasting solutions, such as surface engineering, which can contribute to reduce ice accumulation. Quasicrystals (QCs) are metallic materials, but with similar properties to those of ceramic materials, such as low thermal and electrical conductivities, and high hardness. In particular, QCs that have low surface energy are commercially used as coatings to replace polytetrafluoroethylene (PTFE), also known as Teflon, on frying pans, as they do not scratch easily. PTFE exhibits excellent anti-wetting and anti-icing properties and therefore QCs appear as good candidates to be employed as ice-phobic coatings. Al-based QCs have been applied by High Velocity Oxyfuel (HVOF) thermal spray on typically used aeronautic materials, such as Ti and Al alloys, as well as steels. The coatings have been characterized and evaluated, including the measurement of hardness, roughness, wetting properties, ice accretion behavior in an icing wind tunnel (IWT), and ice adhesion by a double lap shear test. The coatings were studied, both as-deposited, as well as after grinding, in order to study the effect of the surface roughness and morphology on the ice accretion and adhesion properties. The QC coating was compared with PTFE and two polyurethane (PU)-based commercial paints, one of them known to have anti-icing properties, and the results indicate an ice accretion reduction relative to these two materials, and ice adhesion lower than bare AA6061-T6, or the PU paint in the ground version of one of the two QCs. Since the QC coatings are hard (GPa Vickers hardness > 5), a durable behavior is expected.


Author(s):  
Tong Yul Cho ◽  
Jae Hong Yoon ◽  
Kil Su Kim ◽  
K.O. Song ◽  
Y.K. Joo ◽  
...  

2005 ◽  
Vol 59 (4) ◽  
pp. 463-467 ◽  
Author(s):  
M. Cherigui ◽  
Z. Salhi ◽  
N.E. Fenineche ◽  
P. Gougeon ◽  
C. Coddet

2016 ◽  
Vol 96 ◽  
pp. 370-376 ◽  
Author(s):  
Jiajing Pan ◽  
Shengsun Hu ◽  
Lijun Yang ◽  
Kunying Ding ◽  
Baiqing Ma

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