Indlela Yokulinganisa Ubulukhuni Bemaminerali
I-Pendahuluan
Ubulukhuni bamaminerali buyisici esibalulekile se-geology kanye ne-mineralogy. Lesi sici sihlobene nokumelana kweminerali ekuklwebhekeni noma ekukhuculukeni. Ukulinganisa ubulukhuni bamaminerali kuyinqubo edinga izindlela ezahlukene namathuluzi afanele ukuthola imiphumela enembile. Lesi sihloko sizoxoxa ngezindlela ezahlukene zokulinganisa ubulukhuni bamaminerali, kusukela ezindleleni ezijwayelekile njengesikali se-Mohs kuya kumasu ayinkimbinkimbi kakhulu njengokuhlolwa kobulukhuni be-Vickers.
Isikali se-Mohs: Indlela Eyisisekelo
Enye yezindlela ezilula neziyaziwa kakhulu zokulinganisa ubulukhuni bamaminerali yisilinganiso se-Mohs. Esethulwe yisazi se-mineralogist uFriedrich Mohs ngo-1812, isikali se-Mohs sihlela amaminerali ngokusekelwe ekhonweni lawo lokuklwebha noma lokuklwebha ngamanye amaminerali. Lesi sikali siqukethe amaminerali ayi-10 abhekiselwe kuwo anikezwe inombolo yobulukhuni esukela ku-1 (iminerali ethambile kakhulu, i-talc) kuya ku-10 (iminerali enzima kakhulu, idayimane).
Izinyathelo Zokusebenzisa Isikali se-Mohs:
1. Lungisa Isampula: Khetha i-mineral ofuna ukuyihlola bese uqinisekisa ukuthi indawo ihlanzekile futhi ayinazo izingcolisi ezingathinta imiphumela.
2. Ukuhlonza Okubhekiselwe: Lungisa isethi yamaminerali okubhekiselwe kuwo avela esikalini se-Mohs afaka i-talc (1), i-gypsum (2), i-calcite (3), i-fluorite (4), i-apatite (5), i-feldspar (6), i-quartz (7), i-topaz (8), i-corundum (9), kanye nedayimane (10).
3. Yenza Ukuhlolwa Kokuklwebha: Hlikihla i-minerali ebhekiselayo kusampula ehlolwayo. Uma i-minerali ebhekiselayo iklwebha isampula, khona-ke ubulukhuni besampula buphansi kunobulukhuni be-minerali ebhekiselayo. Uma kungenjalo, ubulukhuni besampula buphakeme.
4. Qopha Imiphumela: Thola ukuthi isampula yakho iwela kuphi esikalini se-Mohs ngokusekelwe emiphumeleni yokuhlolwa kokuklwebheka.
Isibonelo secala:
Uma i-calcite (ubulukhuni 3) iklwebha isampula yakho, kodwa i-fluorite (ubulukhuni 4) ingakwazi ukuklwebha isampula yakho, ubulukhuni beminerali yakho buphakathi kuka-3 no-4 esikalini se-Mohs.
Le ndlela ithandwa kakhulu ngenxa yobulula bayo, kodwa futhi inemikhawulo ikakhulukazi maqondana nokunemba nokunemba kwamanani obulukhuni obuphakathi.
Ukuhlolwa Kokuqina Kwe-Vickers
Indlela ye-Vickers iyindlela ethuthukisiwe esetshenziselwa ukukala ubulukhuni bamaminerali ngemininingwane eminingi kanye nokunemba okukhulu. Le ndlela ihilela ukucindezela iphiramidi yedayimane ebusweni bamaminerali ngamandla athile. Ukujula noma ububanzi bokuklwebheka okubangelwayo kuyalinganiswa ukuze kutholakale ubulukhuni be-Vickers (HV).
Izinyathelo Zokusebenzisa Indlela ye-Vickers:
1. Lungisa Isampula: Sika bese upholisha isampula yamaminerali kuze kube yilapho ubuso bubushelelezi kakhulu.
2. Lungisa Ithuluzi Lokuhlola le-Vickers: Leli thuluzi livame ukuba nephiramidi yedayimane kanye ne-microscope yokukala ukugoba.
3. Yenza Ukuhlolwa Kokucindezela: Cindezela iphiramidi yedayimane phezu kobuso beminerali ngamandla athile bese uyibamba isikhathi esithile.
4. Linganisa i-Curve: Linganisa ububanzi be-curve ephumayo usebenzisa i-microscope ehlanganiswe nethuluzi lokuhlola.
5. Bala Ukuqina kwe-Vickers: Sebenzisa ifomula enikezwe yindlela ye-Vickers ukuze ubale ubulukhuni. Ubulukhuni be-Vickers bungakhiwa njengo-HV = 1.854 F/D², lapho u-F kungamandla okucindezela ngamandla e-kilogram (kgf) kanti u-D ububanzi bokugoba ngamamilimitha.
Ukuhlolwa Kokuqina Kwe-Brinell
Indlela yeBrinell ingenye indlela esetshenziswa kakhulu ezintweni ezithambile noma ezibuthakathaka kakhulu. Lolu hlelo lusebenzisa ibhola lensimbi noma le-carbide elicindezelwe ebusweni bento ngamandla athile. Ububanzi bokugoba obuvelayo kulinganiswa ukuze kutholakale inani lobunzima beBrinell (HB).
Izinyathelo Zokusebenzisa Indlela KaBrinell:
1. Lungisa Isampula: Ubuso beminerali kumele bube yisicaba futhi bungabi nokungcola.
2. Lungisa Imishini Yokuhlola iBrinell: Ngokuvamile iqukethe ibhola lensimbi kanye ne-microscope ukukala ukugoba.
3. Yenza Ukuhlolwa Kokucindezela: Cindezela ibhola lensimbi phezu kobuso beminerali ngamandla athile bese ulibamba isikhathi esithile.
4. Kala i-Curve: Kala ububanzi be-curve ngokunembile usebenzisa i-microscope.
5. Bala Ukuqina kweBrinell: Sebenzisa ifomula ethi HB = 2F / (πD(D – sqrt(D² – d²))), lapho u-F kungamandla okucindezela kuma-newton, u-D ububanzi bebhola lokuhlola, kanye no-d ububanzi bokugoba.
Amasu Engeziwe
Ngaphezu kwezindlela esezishiwo kakade, kunezinye izindlela eziningana zokulinganisa ubulukhuni bamaminerali, njengendlela ye-Knoop, indlela ye-Rockwell, kanye nokuhlolwa kobulukhuni obuncane kusetshenziswa i-nanoindentation. Indlela ngayinye inezinzuzo nemikhawulo yayo, kodwa yonke ihlose ukukhiqiza idatha ngezinga eliphezulu lokunemba nemininingwane.
Indlela ye-Knoop
Ukuhlolwa kobulukhuni be-Knoop (KHN) kuyindlela efana nendlela ye-Vickers, kodwa kusetshenziswa i-triangular pyramidal indenter. Le ndlela ivame ukusetshenziselwa ukuhlola izinto ezincane kakhulu noma ezibuthakathaka.
Indlela yeRockwell
Ukuhlolwa kobulukhuni beRockwell kuyindlela esebenzisa i-indenter eyindilinga noma eyindilinga ukukala ukujula kokungena kwento engaphansi komthwalo. Inani libalwa ngokuqhathanisa ukujula kokungena kwe-indenter ngaphambi nangemva kokusetshenziswa kwamandla.
I-Nanoindentation
Indlela yesimanje neyinkimbinkimbi, i-nanoindentation, ihilela ukusebenzisa i-indenter encane kakhulu ukukala izakhiwo zemishini zezinto eziku-nanoscale. Le ndlela iwusizo kakhulu ekufundeni izakhiwo ezincane zamaminerali.
Isiphetho
Ukulinganisa ubulukhuni bamaminerali kuyisici esibalulekile se-geology kanye ne-mineralogy. Izindlela zokulinganisa ubulukhuni zisukela kumasu alula njengesikali se-Mohs kuya kumasu athuthukile njengokuhlolwa kobulukhuni be-Vickers, Brinell, kanye ne-Knoop. Ukukhetha indlela kuncike ohlotsheni lwamaminerali ahlolwayo kanye nezinga lokunemba elifiswayo. Ngokwazi kahle lawa masu, ososayensi nochwepheshe bangaqonda futhi basebenzise izakhiwo zomzimba zamaminerali ngezinhlelo ezahlukahlukene, kusukela ocwaningweni lwesayensi kuya embonini.
