ʻAʻole hiki ke hoʻomaʻemaʻe maikaʻi ʻia ka silicon carbide a me ka nitride silicon me ka metala hoʻoheheʻe. Ma waho aʻe o ka hoʻokomo ʻia ʻana e ka magnesium, nickel, chromium alloy a me ke kila kila, ʻaʻohe o lākou wettability i nā metala ʻē aʻe, no laila he kūpaʻa maikaʻi loa lākou a hoʻohana nui ʻia i ka ʻoihana electrolysis aluminika.
I loko o kēia pepa, ua noiʻi ʻia ke kūʻē ʻana o ka silikon carbide R-SiC a me ka nitride silicon carbide Si3N4-SiC i ka hoʻoheheʻe wela Al-Si alloy mai nā latitu he nui.
Wahi a ka ʻikepili hoʻokolohua o 9 mau manawa o ka holo kaʻa wela o 1080h ma 495 ° C ~ 620 ° C alumini-silicon alloy hehee, ua loaʻa nā hopena loiloi.
Hoʻonui ka R-SiC a me Si3N4-SiC i ka manawa ʻino a ua emi ka nui o ka corrosion. ʻO ka helu corrosion e like me ka pilina logarithmic o ka attenuation. (helu 1)
Ma o ka ikehu spectrum analysis, ka R-SiC a me Si3N4-SiC samples ia lakou iho aohe alumini-silikona; i ke kumu XRD, kekahi nui o ka alumini-silikona peak ka ili-koena alumina-silikona alloy. (Kiʻi 2 – Kiʻi 5)
Ma o ka nānā ʻana o SEM, i ka piʻi ʻana o ka manawa corrosion, ua wehe ke ʻano holoʻokoʻa o nā laʻana R-SiC a me Si3N4-SiC, akā ʻaʻohe pōʻino maopopo. (Kiʻi 6 – Kiʻi 7)
ʻO ke kuʻekuʻe o ka ʻili σs / l> σs / g o ka pilina ma waena o ka wai alumini a me ka seramika, ʻo ke kihi pulu θ ma waena o nā pilina he> 90 °, a ʻaʻole pulu ka pilina ma waena o ka wai alumini a me ka mea seramika pepa.
No laila, ʻoi aku ka maikaʻi o nā mea R-SiC a me Si3N4-SiC i ka pale ʻana i ka corrosion e kūʻē i ka hoʻoheheʻe silika alumini a he ʻokoʻa iki. Eia naʻe, he haʻahaʻa loa ke kumukūʻai o nā mea Si3N4-SiC a ua hoʻohana maikaʻi ʻia no nā makahiki he nui.
Ka manawa hoʻouna: Dec-17-2018