Pengaruh komposisi penguat carbon nanotube dan jenis matriks terhadap peningkatan ketahanan aus dan self lubrication cylinder liner dan cincin torak berbasis pelapisan CNT Al2O3 dengan metode penyemprotan dingin = Effect of carbon nanotube composition strengthening and matrix types to improving wear resistance and self lubrication coating cylinder liner and piston ring with CNT Al2O3 coating by cold spraying / Aji Wicaksono