Kedu ihe bụ ihe onwunwe nke zirconium 705 alloy?
Zirconium nwere ngalaba nnabata neutron dị ala, ike dị elu na isi ike, nguzogide corrosion mara mma, yana ductility. A na-eji ya n'ọtụtụ ebe n'ọhịa nke ụlọ ọrụ ike atọm, ikuku ikuku, na biomedicine. Ọ bụ ihe dị mkpa atụmatụ, nke a makwaara dị ka "Nla nke mbụ nke ọgbọ atọm." Iji nwetakwuo nkwụsi ike nke ojiji nke zirconium alloys ma belata ihe isi ike na nhazi na n'ichepụta ihe, ọ dị mkpa ijikọ ihe ndị na-emepụta ihe na zirconium. Ya mere, ọ dị oké mkpa iji mụọ usoro na njirimara nke njikọ alloy okpukpu abụọ mgbe emechara site na teknụzụ ịgbado ọkụ, na ịgbado ọkụ mgbasa bụ usoro njikọta ihe a na-ahụkarị nke enwere ike iji maka ịgbado ọkụ zirconium na zirconium alloys.
Zr705 zirconium alloy A na-eji ya eme ihe dị ka isi ihe, a na-agbakwunye Cu dị ka oyi akwa nke etiti, na-arụ ọrụ ịgbado ọkụ n'okpuru ọnọdụ dị iche iche. A na-amụkarị mmetụta nke ọkpụrụkpụ oyi akwa etiti Cu na okpomọkụ ịgbado ọkụ na microstructure na akụrụngwa nke mgbasa welded nkwonkwo. A tụlere nkwonkwo ahụ. Usoro nhazi; na mgbakwunye, a nwalere nguzogide corrosion nke nkwonkwo na ngwọta acidic site na nyocha nke nrụrụ nke imikpu, na nguzogide corrosion nke nkwonkwo welded nwetara n'okpuru dị iche iche nke etiti oyi akwa na okpomọkụ ịgbado ọkụ. Nsonaazụ gosiri:
① Mgbe agbakwunyere Cu foil dị ka etiti oyi akwa, mgbe Cu foil ọkpụrụkpụ bụ 30μm-ịgbado ọkụ okpomọkụ 900>920 Celsius C na Cu foil ọkpụrụkpụ bụ 10μm-welding okpomọkụ 880, 900, 920C, interface e guzobere nso isi. metal E nwere abụọ nhazi Ọdịdị, Widmanstatten Ọdịdị, na dual-phase Ọdịdị, nke nwere ike mere site mgbasa nke Cu atọm. Mgbe okpomọkụ gafere 920 Celsius C wee rute 940 ma ọ bụ 960 Celsius, okpomọkụ nke a->p na-agbanwe kpamkpam na-eru, na ihe nhazi ihe niile bụ Widmanstaten.
② Mgbe ọkpụrụkpụ foil Cu bụ 30μm - okpomọkụ ịgbado ọkụ 900, 920% na Cu foil ọkpụrụkpụ 10μm. Welding okpomọkụ 880.900 Celsius C, a oyi akwa nke intermetallic compound na-guzobere na nkwonkwo, na a compound oyi akwa nwere Zr2Cu.Zri4Cu5i> ZrCu>ZrCu5 na Zr3Cu8 n'ụzọ na Zr7Cuio na Zr8Cu5 n'ụzọ nwere ike ịdị. Tụkwasị na nke ahụ, mgbe ị na-eji Cu na ọkpụrụkpụ nke 10 μm dị ka oyi akwa dị n'etiti otu okpomọkụ (920 Celsius C), ọ dịghị ogige intermetallic e kpụrụ, na-egosi na ọkpụrụkpụ nke foil ọla kọpa nwere mmetụta ụfọdụ na mmeghachi omume kemịkalụ interfacial. Mgbe ị na-abawanye okpomọkụ nke soldering ruo 940 Celsius C na 960 Celsius. (N'oge 2, ọ dịghị metal compound oyi akwa e guzobere na nkwonkwo ebe Cu na a ọkpụrụkpụ nke 30pm ma ọ bụ 10 pm ka agbakwunyere dị ka etiti oyi akwa. Ihe kpatara ya nwere ike ịbụ na ịgbado ọkụ okpomọkụ accelerated mgbasa ọnụego na anya nke Cu atọm n'ime. matrix Zr, na atom Cu siri ike. Gbasara na matriks Zr, a na-emesị mepụta mpaghara ngwọta siri ike nke Zr-Cu.
③ N'ịdị elu nke 30μmCu foil, ike kachasị ike ji nwayọọ nwayọọ na-abawanye na mmụba nke okpomọkụ, na elongation na-ebu ụzọ na-abawanye ma na-ebelata, mgbe ahụ, okpomọkụ bụ 940 °C; na ọkpụrụkpụ nke 10μmCu foil, kacha ike tensile ike na elongation bụ ma The n'ibu Njirimara nke nkwonkwo na-etolite ogige oyi akwa bụ ndị ogbenye, nke kwesịrị ịbụ n'ihi na kenkuwa ike agba nke intermetallic compound. A na-emeziwanye ihe eji arụ ọrụ nke nkwonkwo na-enweghị igwe intermetallic metal mgbe okpomọkụ dị 940 Celsius. Mgbe, kacha ike tensile ike na elongation nke nkwonkwo bụ ndị kasị elu n'etiti niile ọkpụrụkpụ, na mụbara site 576MPa na 23% na 30μm ka 580MPa na 32% na 10μm (mbụ isi ihe 585MPa na 44%).
Ọnụego corrosion nke zirconium alloy N'ime mmiri na-emebi acidic na-erughị 0.5% / h. Site n'echiche nke micromorphology corrosion, nguzogide corrosion bụ: post-weld base material> weld area without compound layer> mbụ base material> compound layer Weld area; Site n'echiche nke ọnụ ọgụgụ corrosion na ọnụ ọgụgụ dị arọ, ọnụ ọgụgụ corrosion na ọnụ ọgụgụ dị arọ nke isi ihe mbụ bụ nke kachasị elu, na ọnụ ọgụgụ dị arọ ruru 44%. Ka okpomọkụ ịgbado ọkụ na-abawanye, ọnụ ọgụgụ corrosion na-ebelata yana ọnụego mfu arọ na-ebelata.
