Ese Precision-Slit Zahabu-Lacqued Foil irashobora gukumira isuri ya Oxygene ya Atome ku cyogajuru cyo munsi yisi ya Orbit?

Icyogajuru gikorera muri Orbit yo hasi (LEO, 200 km - 1.000 km ) gihura nikirere kidasanzwe. Ubwoko bwiganje mu kirere kuri ubu butumburuke - Atome Oxygene ( AO ) - biterwa no gufotora kwa ogisijeni ya molekile ( O ₂) munsi y’imirasire ikabije y’izuba ultraviolet. Icyogajuru kizenguruka umuvuduko ukabije ( ~ 7.8 km / s ) bigira ingaruka zingufu nyinshi ( ~ 4.5 eV - 5.0 eV ) biturutse kuri ziriya radicals oxyde.

Polimeri idakingiwe, ibiringiti bishyuha, hamwe na karubone yibasiwe nisuri ikabije yangiza imiti, gutakaza ibintu byinshi, kwangirika kwubutaka, no kwangirika kwa optique mugihe cya bombe ya AO. Impapuro zuzuye-zahabu zometseho feza - ihuza aluminiyumu nziza cyane cyangwa Kapton / polyimide substrate hamwe nu mwanya wo mu kirere, silicone idafite zahabu fluoropolymer cyangwa imyuka yumubiri yabitswe (PVD) zahabu / silika nano-layer - itanga ingabo ya ogisijeni ya atome itemewe. Ihagarika neza isuri yicyerekezo cya AO, irwanya iyangirika ryizuba rya UV, kandi itanga ubushyuhe buhoraho bwumuriro hamwe nogukoresha izuba hejuru yubutumwa bwagutse.

Hypervelocity Chemical Erosion Mechanism muri LEO

Ku muvuduko wa orbital ( ~ 7.8km / s ), ogisijeni ya atome igira icyogajuru icyogajuru kireba hejuru yintama zifite imbaraga za kinetic zihagije kugirango ziveho imiti mvaruganda:

Igipimo cya degrame ya polymer: Polyimide isanzwe (Kapton) hamwe na epoxy yibigize bigenda byangirika ku gipimo kigera kuri 3.0 × 10⁻⊃2; ⁴ cm³ / atom, biganisha ku miterere ikomeye yo kunanirwa an`d gukanika imashini.

Ingaruka ya Atome Oxygene (Eᵧ): Ipima ingano y'ibintu byatakaye kuri atome ya ogisijeni. Ibikoresho bigenewe ubutumwa bwigihe kirekire LEO bigomba kugera kuri Eᵧ yegera zeru.

Ubuhanga bwo Kurinda Zahabu-Lacquer

Zahabu yinjizwamo ingufu za atome ya ogisijeni kubera ko okiside ya okiside itameze neza cyane mu gihe ingufu za LEO zivuga:

Inert Metallic Surface Matrix: Atome ya zahabu (Au) ntabwo byoroshye gukora oxyde ihindagurika ihindagurika munsi ya 5 eV AO, ikomeza ubwinshi bwubuso hamwe nubwinshi bwimiterere.

Umwanya uhuza Umwanya-Grade Lacquer Matrix: Ibara ryinshi rya zahabu ryera ryinjijwe muri silicone itagira silicone, fluoropolymer cyangwa polimide itwara ibintu byinshi ikora inzitizi yuzuye ibuza aluminium cyangwa polymer insimburangingo.

Kwemeza Tekinike & Ibipimo ngenderwaho

Imikorere ya matrix ikurikira irerekana ibyingenzi byingenzi-byujuje ibyangombwa byujuje ibyangombwa byerekana icyogajuru icyogajuru cyuzuye-zahabu.

Ibyiza byingenzi byumwuga mubuhanga bwindege

Ibibazo

Q1: Kuki ogisijeni ya atome yangiza cyane ibikoresho byogajuru muri LEO?

Igisubizo: Umwuka wa ogisijeni utangwa iyo imirasire ya UV itandukanije O ₂ molekile zitandukanye. Ku muvuduko wa LEO ( ~ 7.8 km / s ), AO igira ingaruka ku cyogajuru hamwe na 5 eV  yingufu za kinetic, ikavunika imiti kama kama kandi ikangiza vuba polymers idakingiye, fibre karubone, hamwe n amarangi.

Q2: Nigute fili yometseho zahabu irinda isuri ya ogisijeni ugereranije na Kapton isanzwe?

Igisubizo: Zahabu yinjizwamo imiti kandi ntabwo ikora na atome ya ogisijeni ifite ingufu nyinshi. Mugihe Kapton isanzwe yangirika vuba mugihe AO yerekanwe, igipfundikizo cya zahabu-lacquer gikora nkinzitizi idashobora kubuza AO guhura nibintu byihishe.

IKIBAZO: Ni izihe nyungu zo gutobora neza zahabu-lac lakile yo gukora ibyogajuru?

Igisubizo .​​

Q4: Ese ifu yometseho zahabu irenga NASA na ESA vacuum irenze ibisabwa?

Igisubizo: Yego. Umwanya wa zahabu wo mu kirere ukoresha chimie yihariye ya polimeri yakize ku bushyuhe bwinshi, ikanyura mu buryo bworoshye ASTM E595 ibipimo ngenderwaho hamwe na Mass Mass Loss ( TML ) munsi ya 1.0%  hamwe n’ibikoresho byakusanyirijwe hamwe ( CVCM ) munsi ya 0.10%.

Q5: Impapuro zometseho zahabu zishobora kwihanganira igare rikabije ryumuriro wa LEO?

Igisubizo: Yego. Icyogajuru cya LEO gifite ubushyuhe bwihuse (kuva -120 ° C  mu bwirakabiri kugeza kuri + 120 ° C ku zuba ry'izuba buri minota 90). Imbaraga nyinshi zifatika hamwe no kwaguka kwinshi kwa matrike ya lacquer birinda gucikamo mikoro, guhindagurika, cyangwa gukuramo munsi yubushyuhe.

Umwanzuro

Impapuro zuzuye-zahabu zometseho ni igisubizo kidasanzwe, cyerekanwe nindege yo gukumira isuri ya ogisijeni ya atome no gucunga neza ubushyuhe bw’icyogajuru cyo hasi-Orbit.

Kugirango uhindure ibikoresho byo guhitamo icyogajuru kirinda ubushyuhe:

Kugaragaza Ibipimo Byujuje Umwanya ( ASTM E595 / ASTM E2089): Manda yemejwe nubutaka bushingiye ku butaka bwa AO bwerekana amakuru hamwe no gupima bike (TML <1.0%, CVCM <0.10%).

Hitamo Substrate Core ikwiye: Hitamo ifu ya aluminiyumu yuzuye-isukuye cyane kugirango itwarwe nubushyuhe bwinshi, cyangwa firime ya polyimide kubisabwa bisaba ingufu za dielectric breakdown voltage hamwe no kurwanya amarira.

Shimangira Ubwiza Bwiza Bwiza: Saba icyogero cyogusukura kugirango ukureho burrs hamwe nuduce duto dushobora kwanduza optique ya optique cyangwa izuba ryinshi.