Ubudahangarwa bwa R-SiC na Si3N4-SiC mu gushonga kwa Aluminiyumu-silicon Alloy Melt

Karubide ya silikoni na nitride ya silikoni ntibishobora kunyagirwa n'icyuma gishongeshejwe. Uretse kuba byinjizwamo na manyeziyumu, nikeli, aloyimu ya chromium n'icyuma kitagira umugese, ntibishobora kunyagirwa n'ibindi byuma, bityo birwanya ingese neza kandi bikoreshwa cyane mu nganda zikora amashanyarazi ya aluminiyumu.

Muri iyi nyandiko, uburyo bwo kurwanya ingese bwa silicon carbide R-SiC yasubiwemo na silicon nitride bonded silicon carbide Si3N4-SiC mu binyabutabire bya Al-Si alloy bishonga bishyushye byakorewe ubushakashatsi ku bice byinshi.

Dukurikije amakuru y’igerageza y’inshuro 9 z’ubushyuhe bwa 1080h mu bushyuhe bwa 495 ° C ~ 620 ° C alloy melt ya aluminiyumu-silicon, ibisubizo bikurikira byabonetse.

Ingero za R-SiC na Si3N4-SiC ziyongereye uko igihe cyagenwe cyo kwangirika kandi igipimo cyo kwangirika cyaragabanutse. Igipimo cyo kwangirika cyajyanye n'isano ya logarithmic yo kugabanuka. (Ishusho ya 1)

Dukurikije isesengura rya spectrum y'ingufu, ingero za R-SiC na Si3N4-SiC ubwazo nta aluminiyumu-silicon zifite; mu ishusho ya XRD, ingano runaka y'umutwe wa aluminiyumu-silicon ni aloyi ya aluminiyumu-silicone iri hejuru y'ibisigaye. (Ishusho ya 2 - Ishusho ya 5)

Binyuze mu isesengura rya SEM, uko igihe cyo kwangirika kiyongera, imiterere rusange y'ibipimo bya R-SiC na Si3N4-SiC iragabanuka, ariko nta cyangiritse kigaragara. (Ishusho ya 6 - Ishusho ya 7)

Ubushyuhe bw'ubuso σs/l>σs/g bw'aho amazi ya aluminiyumu ahurira n'ibumba, inguni itose θ hagati y'aho amazi ahurira ni >90°, kandi aho amazi ya aluminiyumu ahurira n'ibikoresho bya aluminiyumu ntibitose.

Bityo rero, ibikoresho bya R-SiC na Si3N4-SiC ni byiza cyane mu kurwanya ingese mu kurwanya aluminium silicon ishonga kandi nta tandukaniro bifite. Ariko, igiciro cy'ibikoresho bya Si3N4-SiC kiri hasi kandi bimaze imyaka myinshi bikoreshwa neza.