Telah dilakukan penelitian tentang sintesa lapisan komposit AlN iCrCu-(M oO 3 −SiO 2 ) pada pelat baja karbon rendah. Material coating AlN iCrCu-(M oO 3 − SiO 2 ) dicampur dan dimiling untuk menjadi serbuk halus dengan menggunakan metode paduan mechanical alloying (MA). Hasil penampang lintang (cross-section) dapat memperlihatkan bahwa coating AlN iCrCu-(M oO 3 −SiO 2 ) telah berhasil terdeposisi dengan baik pada substrat baja karbon rendah dengan menggunakan metode paduan mechanical alloying (MA) dan memiliki nilai rata-rata ketebalan lapisan permukaan sebesar 38, 162µm−52, 662µm. Hasil analisa surface morfology permukaan dengan penambahan (M oO 3 − SiO 2 ) pada penambahan konsentrasi (M oO 3 − SiO 2 ) sebesar 42% memiliki paduan morfologi yang paling baik daripada sampel yang lain karena memiliki poros yang lebih sedikit. Hasil uji oksidasi cyclic pada suhu 800 o C selama 10 siklus selama 200 jam (perhari 20 jam) dengan menggunakan muffle furnace menunjukkan bahwa semakin meningkat pertambahan massa maka difusi oksigen yang masuk pada permukaan semakin cepat. Kata Kunci : baja karbon rendah, pelapis, mechanicalalloying (MA), oksidasi siklik. AbstractResearch on the synthesis of AlN iCrCu-(M oO 3 − SiO 2 ) composite layers on low carbon steel plates has been carried out. AlN iCrCu-(M oO 3 −SiO 2 ) coating material is mixed and milled to become a fine powder using the mechanical alloying (MA) alloy method. Cross-section results can show that the AlN iCrCu-(M oO 3 − SiO 2 ) coating has successfully deposited well on low carbon steel substrates using the mechanical alloying (MA) alloying method and has an average surface layer thickness of 38.162µm − 52, 662µm. The results of surface morphology analysis with the addition (M oO 3 − SiO 2 ) at the addition of concentration (M oO 3 − SiO 2 ) of 42% have the best morphological alloys than the other samples because they have fewer shafts. The results of the cyclic oxidation test at 800 o C for 10 cycles for 200 hours (20 hours per day) using muffle furnace showed that the more mass increases the oxygen diffusion that enters the surface is faster.
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