Hanyar Gwaji don Kauri da Taurin Fim ɗin Oxide na Abubuwan Aluminum na Mota

Fim ɗin anodic oxide da ke kan sassan ƙarfe na aluminum na mota yana aiki kamar sulke a saman su. Yana samar da wani kariyar kariya mai yawa a saman ƙarfe na aluminum, yana ƙara juriyar tsatsa na sassan kuma yana tsawaita tsawon rayuwarsu. A halin yanzu, fim ɗin oxide yana da tauri mai yawa, wanda zai iya inganta juriyar lalacewa na saman ƙarfe na aluminum.

Fim ɗin anodic oxide na aluminum gami yana da ɗan kauri da tauri mai yawa. Ya zama dole a zaɓi kayan aikin gwaji da suka dace da ƙananan tauri don guje wa lalacewar layin fim ɗin ta hanyar indenter. Saboda haka, muna ba da shawarar amfani da na'urar gwada tauri ta micro Vickers tare da ƙarfin gwaji na 0.01-1 kgf don gwada tauri da kauri. Kafin gwajin tauri na Vickers, kayan aikin da za a gwada yana buƙatar yin samfuri. Kayan aikin da ake buƙata injin hawa ƙarfe ne (ana iya cire wannan matakin idan kayan aikin yana da saman lebur biyu) don ɗora kayan aikin a cikin samfurin tare da saman lebur guda biyu, sannan a yi amfani da injin niƙa da goge ƙarfe don niƙa da goge samfurin har sai an sami saman mai haske. Injin hawa da injin niƙa da goge ƙarfe an nuna su a cikin hoton da ke ƙasa:

1. Matakan Shiri na Samfura (Ana amfani da shi don Gwajin Tauri da Kauri)

1.1 Samfurin: Yanke samfurin kimanin 10mm × 10mm × 5mm daga kayan da za a gwada (a guji yankin da ke damun sinadarin), kuma a tabbatar da cewa saman gwajin shine ainihin saman fim ɗin oxide.

1.2 Haɗawa: Haɗa samfurin da kayan ɗagawa masu zafi (misali, resin epoxy), fallasa saman fim ɗin oxide da kuma ɓangaren giciye (ana buƙatar sashe don gwajin kauri) don hana gurɓacewar samfurin yayin niƙa.

1.3 Niƙa da Gogewa: Da farko, a yi niƙa mai ruwa-ruwa mataki-mataki da takarda mai girman 400#, 800#, da 1200#. Sannan a goge da manna lu'u-lu'u mai girman 1μm da 0.5μm. A ƙarshe, a tabbatar da cewa haɗin da ke tsakanin fim ɗin oxide da substrate ba shi da karce kuma a bayyane yake (ana amfani da ɓangaren giciye don lura da kauri).

2. Hanyar Gwaji: Hanyar Vickers Microhardness (HV)

2.1 Babban Ka'ida: Yi amfani da mai shigar da lu'u-lu'u na pyramid don shafa ƙaramin kaya (yawanci 50-500g) a saman fim ɗin don ƙirƙirar maɓalli, kuma a ƙididdige taurin bisa ga tsawon maɓalli na maɓalli.

2.2 Ma'aunin Muhimmanci: Dole ne nauyin ya yi daidai da kauri na fim ɗin (zaɓi kaya <100g lokacin da kauri na fim ɗin <10μm don guje wa shiga cikin substrate)

Mabuɗin shine a zaɓi kaya wanda ya dace da kauri na fim ɗin kuma a hana ɗaukar kaya mai yawa shiga cikin fim ɗin oxide, wanda zai sa sakamakon da aka auna ya haɗa da ƙimar taurin substrate na aluminum alloy (taurin substrate ya fi ƙasa da na fim ɗin oxide).

Idan kauri na fim ɗin oxide ya kai 5-20μm: Zaɓi nauyin 100-200g (misali, 100gf, 200gf), kuma dole ne a sarrafa diamita na shigarwa cikin 1/3 na kauri na fim ɗin (misali, don kauri na fim ɗin 10μm, diagonal na shigarwar ≤ 3.3μm).

Idan kauri na fim ɗin oxide ya kai <5μm (fim ɗin siriri sosai): Zaɓi kaya ƙasa da 50g (misali, 50gf), kuma dole ne a yi amfani da ruwan tabarau mai girman girma (40x ko sama da haka) don lura da shigar ciki don guje wa shigar ciki.

Lokacin gudanar da gwajin tauri, muna komawa ga ma'aunin: ISO 10074:2021 "Ƙayyadadden Shafi Mai Tauri na Anodic Oxide akan Aluminum da Alloys na Aluminum", wanda ke ƙayyade ƙarfin gwaji da kewayon tauri da za a yi amfani da su a sarari lokacin auna nau'ikan shafunan oxide daban-daban tare da na'urar gwajin tauri ta micro Vickers. Cikakken bayani dalla-dalla an nuna su a cikin teburin da ke ƙasa:

Tebur: Ƙimar karɓa don gwajin Vickers microhardness

Lura: Ga fina-finan oxide masu kauri fiye da 50 μm, ƙimar microhardness ɗinsu ba ta da yawa, musamman ma Layer na waje na fim ɗin

2.3 Gargaɗi:

Ga wannan ɓangaren, ya kamata a auna maki 3 a kowanne daga cikin fannoni 3 daban-daban, kuma matsakaicin ƙimar maki 9 na bayanai ya kamata a ɗauka a matsayin taurin ƙarshe don guje wa tasirin lahani na fim na gida akan sakamakon.
Idan "fashewa" ko "ɓangarorin da ba su da kyau" suka bayyana a gefen shigarwar, hakan yana nuna cewa nauyin ya yi yawa kuma ya shiga cikin layin fim ɗin. Ya kamata a rage nauyin kuma a sake gudanar da gwajin.