Maitiro Ekuyera Kuoma Kwemaminerari
Pendauluan
Kuomarara kwezvicherwa chinhu chakakosha mu geology ne mineralogy. Hunhu uhwu hune chekuita nekudzivirira kwezvicherwa kukwenywa kana kukwenywa. Kuyera kuomarara kwezvicherwa inzira inoda nzira dzakasiyana siyana uye maturusi akakodzera kuti uwane mhedzisiro chaiyo. Chinyorwa chino chichakurukura nzira dzakasiyana dzekuyera kuomarara kwezvicherwa, kubva munzira dzakajairwa dzakadai seMohs scale kusvika kune nzira dzakaomarara dzakadai seVickers hardness test.
Chikero cheMohs: Nzira Yekutanga
Imwe yenzira dziri nyore uye dzinozivikanwa dzekuyera kuomarara kwezvicherwa ndiyo Mohs scale. Yakatangwa nenyanzvi yezve mineral Friedrich Mohs muna 1812, Mohs scale inoronga zvicherwa zvichienderana nekukwanisa kwadzo kukwenya kana kukwenya nezvimwe zvicherwa. Chikero ichi chine zvicherwa gumi zvinotsanangurwa zvine nhamba yekuomarara kubva pa1 (mineral yakapfava, talc) kusvika pa10 (mineral yakaoma, diamond).
Matanho Ekushandisa Chikero cheMohs:
1. Gadzirira Muenzaniso: Sarudza chicherwa chaunoda kuyedza uye iva nechokwadi chekuti pamusoro pacho pakachena uye hapana kusvibiswa kunogona kukanganisa mhedzisiro yacho.
2. Kuziva Zvinodiwa: Gadzira seti yezvicherwa zvinofanirwa kutorwa kubva pachikero cheMohs zvinosanganisira talc (1), gypsum (2), calcite (3), fluorite (4), apatite (5), feldspar (6), quartz (7), topaz (8), corundum (9), uye diamond (10).
3. Ita Bvunzo Yekukwenya: Kwiza chicherwa chemuenzaniso chiri kuyedzwa. Kana chicherwa chemuenzaniso chikakwenya muenzaniso, kuoma kwemuenzaniso kwakaderera pane kuoma kwemuenzaniso. Kana zvisina kudaro, kuoma kwemuenzaniso kwakakwira.
4. Nyora Zvabuda: Sarudza kuti sampuro yako inowira papi pachikero cheMohs zvichibva pamhedzisiro yebvunzo yekukwenya.
Muenzaniso wenyaya:
Kana calcite (kuomarara 3) ikakwenya sampuli yako, asi fluorite (kuomarara 4) ikasakwenya sampuli yako, kuomarara kwemineral yako kuri pakati pe3 ne4 pachikero cheMohs.
Nzira iyi inozivikanwa zvikuru nekuda kwekureruka kwayo, asi inewo miganhu kunyanya panyaya yekururama uye kunyatsojeka pahukoshi hwepakati nepakati.
Vickers Kuomarara Bvunzo
Nzira yeVickers inzira yepamusoro inoshandiswa kuyera kuomarara kwezvicherwa neruzivo rwakadzama uye nemazvo. Nzira iyi inosanganisira kudzvanya piramidhi yedhaimani pamusoro pechicherwa nesimba rakati. Kudzika kana upamhi hwekukwenya kunozoyerwa kuti kuonekwe kuomarara kweVickers (HV).
Matanho Ekushandisa Nzira yeVickers:
1. Gadzirira Muenzaniso: Cheka wopukuta muenzaniso wezvicherwa kusvika pamusoro pacho panyatsotsvedzerera.
2. Gadzirira Vickers Test Tool: Chishandiso ichi chinowanzova nepiramidhi yedhaimani uye maikorosikopu yekuyera kutenderera.
3. Ita Bvunzo Yekudzvanya: Dzvanya piramidhi yedhaimani pamusoro pechicherwa nesimba rakati woibata kwenguva yakati.
4. Yera Mupendero: Yera dhayamita yemupendero unobva wabuda uchishandisa maikorosikopu yakabatana nechishandiso chekuyedza.
5. Verenga Kuomarara kweVickers: Shandisa fomura yakapihwa nenzira yeVickers kuti uverenge kuomarara. Kuomarara kweVickers kunogona kuumbwa seHV = 1.854 F/D², apo F isimba rekumanikidza mukg-force (kgf) uye D idhayamita yekudzika mu millimeters.
Bvunzo reKuoma kweBrinell
Nzira yeBrinell imwe nzira inoshandiswa zvakanyanya pazvinhu zvakapfava kana kuti zvinoputsika. Sisitimu iyi inoshandisa bhora resimbi kana carbide rakadzvanywa pamusoro pechinhu chacho nesimba rakati. Dhayamita yekudzika inoonekwa inoyerwa kuti ione kukosha kweBrinell hardness (HB).
Matanho Ekushandisa Nzira yeBrinell:
1. Gadzirira Muenzaniso: Pamusoro pechicherwa chinofanira kunge chakati sandara uye chisina kusvibiswa.
2. Gadzirira Midziyo Yekuyedza Brinell: Kazhinji inosanganisira bhora resimbi nemaikorosikopu yekuyera kupinda mukati.
3. Ita Bvunzo Yekudzvanya: Dzvanya bhora resimbi pamusoro pechicherwa nesimba rakati woribata kwenguva yakati.
4. Yera Mupendero: Yera dhayamita yemupendero nemazvo uchishandisa maikorosikopu.
5. Verenga Brinell Hardness: Shandisa fomura HB = 2F / (πD(D – sqrt(D² – d²))), apo F isimba rekumanikidza mumaNewton, D idhayamita yebhora rekuyedza, uye d idhayamita yekudzika kwegomba.
Mamwe Matekiniki
Kuwedzera kune nzira dzataurwa kare, kune dzimwe nzira dzakawanda dzekuyera kuomarara kwemineral, dzakadai seKnoop method, Rockwell method, uye microhardness testing uchishandisa nanoindentation. Nzira yega yega ine zvayakanakira nezvayakaipira, asi dzese dzine chinangwa chekugadzira data rine hungwaru hwakanyanya uye ruzivo rwakadzama.
Nzira yeKnoop
Kuedza kuomarara kweKnoop (KHN) inzira yakafanana nenzira yeVickers, asi uchishandisa triangular pyramidal indenter. Nzira iyi inowanzo shandiswa kuyedza zvinhu zvakatetepa kana kuti zvisina kusimba.
Nzira yeRockwell
Kuedza kuomarara kweRockwell inzira inoshandisa denderedzwa rakatenderera kana kuti rakakombama kuyera kudzika kwekupinda muchinhu chiri pasi pemutoro. Kukosha kunoverengerwa nekuenzanisa kudzika kwekupinda kwedenderedzwa simba risati rashandiswa uye mushure mekunge simba rashandiswa.
Nanoindentation
Imwe nzira yemazuva ano uye yakapfava, nanoindentation, inosanganisira kushandisa indenter diki kwazvo kuyera hunhu hwemakanika hwezvinhu pa nanoscale. Iyi nzira inobatsira zvikuru pakudzidza hunhu hwe microstructural hwezvicherwa.
Mhedziso
Kuyera kuomarara kwezvicherwa chinhu chakakosha mu geology uye mineralogy. Nzira dzekuyera kuomarara dzinotangira panzira dziri nyore senge Mohs scale kusvika panzira dzepamusoro dzakadai seVickers, Brinell, uye Knoop hardness tests. Sarudzo yenzira inoenderana nerudzi rwezvicherwa zviri kuyedzwa uye mwero wekururama unodiwa. Nekuziva matekiniki aya, masayendisiti nematekiniki vanogona kunzwisisa nekushandisa hunhu hwezvicherwa mumashandisirwo akasiyana-siyana, kubva pakutsvagisa kwesainzi kusvika kumaindasitiri.
