Zirconate Gadolinium: Imikorere-Yinshi, Ibikoresho Byumuriro Birambye

Ubushyuhe bwumuriro (κ) bupima uburyo ubushyuhe bworoshye butembera mubintu. Gadolinium zirconate ya κ ni hasi cyane bitangaje kuri ceramic, cyane cyane kuri moteri imeze nkubushyuhe. Ubushakashatsi bwerekana agaciro ku rutonde rwa 1-2 W · m⁻¹ · K⁻¹ hafi 1000 ° C. Kubireba, bisanzwe yttria-itunganijwe neza zirconiya (YSZ) - imyaka mirongo ya TBC isanzwe - ni nka 2-3 W · m⁻¹ · K⁻¹ mubushyuhe busa. Mu bushakashatsi bumwe, Wu n'abandi. yasanze imiyoboro ya Gd₂Zr₂O₇ ari ~ 1,6 W · m⁻¹ · K⁻¹ kuri 700 ° C, na ~ 2.3 kuri YSZ mubihe bimwe. Indi raporo ivuga urutonde rwa 1.0–1.8 W · m⁻¹ · K⁻¹ kuri 1000 ° C kuri gadolinium zirconate, “munsi ya YSZ”. Mu buryo bufatika, ibi bivuze ko urwego rwa GdZr₂O₇ ruzareka ubushyuhe buke butarenze igipimo cya YSZ gihwanye n'ubushyuhe bwo hejuru - inyungu nini yo kubika.

Inyungu z'ingenzi za Gadolinium Zirconate (Gd₂Zr₂O₇):

Ultra-low ubushyuhe bwumuriro: ~ 1-2 W / m · K kuri 700-1000 ° C, munsi ya YSZ.

Icyiciro cyo hejuru gihamye: Guma ihagaze kugeza ~ 1500 ° C, hejuru ya YSZ ~ 1200 ° C.

Kwiyongera k'ubushyuhe bwinshi: Kwagura byinshi kubushyuhe kuruta YSZ, bishobora kugabanya imihangayiko muri coatings.

Oxidation hamwe na ruswa irwanya ruswa: Ifata ibyiciro bihamye bya oxyde; irwanya ububiko bwa CMAS bwashongeshejwe neza kuruta YSZ (zirconate-yisi-zirconates ikunda kwitwara hamwe nububiko bwa silikate kandi ikora kristu ikingira).

Ingaruka y’ibidukikije: Mugutezimbere imikorere ya moteri / turbine, ifasha kugabanya ikoreshwa rya lisansi n’ibyuka bihumanya.

Buri kimwe muri ibyo bintu gifitanye isano ningufu zingirakamaro kandi zirambye. Kuberako GdZr₂O₇ ikingira neza, moteri ikenera gukonjesha gake kandi irashobora gukora ubushyuhe, igasobanurwa muburyo bunoze no gukoresha lisansi nkeya. Nkuko ubushakashatsi bwakozwe na kaminuza ya Virijiniya bubibona, imikorere myiza ya TBC isobanura gutwika “lisansi nkeya kugirango itange ingufu zingana, bigatuma… imyuka ihumanya ikirere”. Muri make, gadolinium zirconate irashobora gufasha imashini gukora neza.

Imyitwarire yubushyuhe burambuye

Kugira ngo dusubize ikibazo cyingenzi “Ubushuhe bwumuriro wa gadolinium zirconate ni ubuhe?”: Ni hasi cyane kuri ceramic, hafi 1-2 W · m⁻¹ · K⁻¹ mu ntera ya 700-1000 ° C. Ibi byashimangiwe nubushakashatsi bwinshi. Wu n'abandi. raporo ≈1.6 W / m · K kuri 700 ° C kuri Gd₂Zr₂O₇, mu gihe YSZ yapimye ≈2.3 mu bihe bimwe. Shen n'abandi. icyitonderwa “1.0–1.8 W / m · K kuri 1000 ° C”. Ibinyuranye, ubushobozi bwa YSZ kuri 1000 ° C mubusanzwe buri hagati ya 2-3 W / m · K. Mubisanzwe bya buri munsi, tekereza amabati abiri yo kubika ku ziko rishyushye: imwe ifite GdZr₂O₇ ituma inyuma ikonja cyane kuruta YSZ tile yubunini bumwe.

Kuki Gd₂Zr₂O₇ iri hasi cyane? Imiterere yacyo ya kirisiti isanzwe ibangamira ubushyuhe. Imyuka ya ogisijeni muri buri selile ikwirakwiza fonone (abatwara ubushyuhe), hamwe nuburemere bwa atolike ya gadolinium irushaho kugabanya ihindagurika rya lattice. Nkuko isoko imwe ibisobanura, "umwanya wa ogisijeni wongera fononi ukwirakwiza kandi bigabanya ubushyuhe bwumuriro". Ababikora bakoresha uyu mutungo: Cataloge ya Epomaterial yanditseho GdZr₂O₇ ikoreshwa muri plasma-yatewe na plasma yumuriro wa barrière kubera cyane κ. Mubusanzwe, microstructure yayo ifata ubushyuhe imbere, ikingira icyuma kiri munsi.