Izolo, uZhang waselebhu ukhale kum kwakhona ukuba idatha yovavanyo lwesampulu erhabaxa yayisoloko ingangqinelani. Ndamphatha egxalabeni ndathi, “Mzalwana, njengezazinzulu zezinto, asinakukwazi ukujonga nje amaphepha edatha; kufuneka singcolise izandla zethu size siqonde iimpawu zezi ngcambu ze-alumina ezimhlophe ezixutywe kakuhle.” Oku kuyinyani; njengokuba umpheki onamava esazi ubushushu obufanelekileyo bokupheka, thina bavavanyi kufuneka “sibe ngabahlobo” bezi ngcambu zimhlophe zibonakala ziqhelekile kuqala.
I-alumina micropowder emhlophe exutywe kakuhle yaziwa kushishino njengohlobo lwekristalei-aluminium oxide, enobunzima beMohs obuyi-9, obulandelayo emva kwedayimani. Kodwa ubuya kuba nephutha xa ubujonga njengenye nje into eqinileyo. Kwinyanga ephelileyo, sifumene iibhetshi ezintathu zeesampuli ezivela kubavelisi abahlukeneyo. Zonke zazifana nomgubo omhlophe njengekhephu, kodwa phantsi kwe-electron microscope, nganye yayineempawu zayo—ezinye iisuntswana zazinemiphetho ebukhali njengeengqayi zeglasi ezaphukileyo, ngelixa ezinye zazithambile njengesanti entle yaselunxwemeni. Oku kukhokelela kwingxaki yokuqala: uvavanyo lobunzima alungomdlalo olula wamanani.
Sihlala sisebenzisa isixhobo sokuvavanya ubunzima obuncinci, apho ucinezela khona i-indenter kwaye idatha iphuma. Kodwa kukho izinto ezingaqhelekanga: ukuba isantya sokulayisha sikhawuleza kakhulu, amasuntswana aqhekekayo anokuqhekeka ngequbuliso; ukuba umthwalo ulula kakhulu, awuyi kulinganisa ubunzima bokwenyani. Ngesinye isihlandlo, ndavavanya ngabom isampuli efanayo ngamanani amabini ahlukeneyo, kwaye iziphumo zahluka ngamayunithi obunzima obupheleleyo be-0.8 Mohs. Kufana nokucofa ivatala ngamaqhina akho; amandla amaninzi kwaye uyayiqhekeza, amancinci kakhulu kwaye awukwazi ukubona ukuba ivuthiwe. Ngoku, ngaphambi kokuvavanya, kufuneka "silungiselele" iisampulu kwindawo yobushushu obuqhelekileyo kunye nomswakama iiyure ezingama-24 ukuze sizivumele zilungele "ubushushu" belebhu.
Ngokuphathelele uvavanyo lokumelana nokuguguleka, loo nto iyinto yobugcisa obuphezulu. Indlela eqhelekileyo kukusebenzisa ivili lerabha eliqhelekileyo ukuhlikihla isampuli phantsi koxinzelelo oluzinzileyo nokulinganisa ukuguguleka. Kodwa ekusebenzeni, ndifumanise ukuba ukunyuka ngakunye kwe-10% kumswakama okusingqongileyo kunokubangela ukuguquguquka okungaphezulu kwe-5% kwizinga lokuguguleka. Kunyaka ophelileyo ngexesha lemvula, iseti yezilingo eziphindaphindwe kahlanu yabonisa idatha esasazeke kakhulu, kwaye ekugqibeleni safumanisa ukuba kungenxa yokuba ukususwa komswakama kwi-air conditioner kwakungasebenzi kakuhle. Umphathi wam uthe into endisayikhumbulayo: “Imozulu engaphandle kwefestile yelebhu nayo iyinxalenye yemilinganiselo yovavanyo.”
Okubangela umdla ngakumbi yimpembelelo yesimo seenxalenye. Ezo nxalenye zincinci zigobile ngokukhawuleza ziyaphela xa zithwele imithwalo emincinci—njengemela ebukhali kodwa ebuthathaka eqhekeza lula xa isika izinto eziqinileyo. Iinxalenye ezingqukuva, ezibunjwe ngokukodwa ngenkqubo ethile, zibonisa uzinzo olumangalisayo phantsi komthwalo ojikelezayo wexesha elide. Oku kundikhumbuza iingqalutye ezisecaleni komlambo kufutshane nedolophu yam; iminyaka yokukhukuliseka kwezikhukula yazenza zomelela ngakumbi. Ngamanye amaxesha, ubunzima obupheleleyo abunakuthelekiswa nokuqina okufanelekileyo.
Kukho elinye inqaku elilula ukulibaleka kwinkqubo yovavanyo: ukusasazwa kobukhulu bezinto ezincinci. Wonke umntu ugxila kubukhulu obuqhelekileyo bezinto ezincinci, kodwa into echaphazela ngokwenene ukumelana nokuguguleka kudla ngokuba yi-10% yezinto ezincinci nezirhabaxa. Zifana “namalungu akhethekileyo” eqela; zimbalwa kakhulu kwaye azinampembelelo, zininzi kakhulu kwaye ziphazamisa ukusebenza ngokubanzi. Ngesinye isihlandlo, emva kokuba sihlolisise i-5% yomgubo ocolekileyo kakhulu, ukumelana nokuguguleka kweqela lonke lezinto kuphucuke ngama-30%. Olu fumaniso lwandinika udumo ku-Old Wang kangangesiqingatha senyanga kwintlanganiso yeqela.
Ngoku, emva kovavanyo ngalunye, ndiye ndaziqhelanisa nokuqokelela iisampulu ezilahliweyo. Iipowder ezimhlophe ezivela kwiibhetshi ezahlukeneyo zinezikhazimla ezahluke kancinci phantsi kokukhanya; ezinye ziluhlaza okwesibhakabhaka, ezinye zimthubi. Iingcali ezinamava zithi oku kukubonakaliswa komahluko kwisakhiwo sekristale, kwaye olu mahluko ludla ngokuphawulwa njengombhalo omncinci kwiphepha ledatha yesixhobo. Abo basebenza ngezandla zabo bayazi ukuba izixhobo zinobomi bazo; baxela amabali abo ngotshintsho oluncinci.
Ekugqibeleni, uvavanyoumgubo omncinci we-corundum emhlopheKufana nokwazi umntu. Amanani akwi-resume (ubulukhuni, ubungakanani bamasuntswana, ubumsulwa) lulwazi olusisiseko; ukuze uyiqonde ngokwenene, kufuneka ubone ukusebenza kwayo phantsi koxinzelelo olwahlukeneyo (utshintsho lomthwalo), kwiindawo ezahlukeneyo (utshintsho lobushushu kunye nokufuma), kwaye emva kokusetyenziswa ixesha elide (uvavanyo lokudinwa). Umatshini wokuvavanya ukunxiba oxabisa izigidi zeerandi kwilebhu uchanekile kakhulu, kodwa isigqibo sokugqibela sisaxhomekeke kumava okuchukumisa kunye nokujonga—njengomntu omdala ochwephesha onokukwazi ukubona ukuba yintoni engalunganga ngomatshini ngokumamela isandi sawo.
Ngexesha elizayo xa ubona "Ubunzima 9, Ukumelana Nokunxiba Okugqwesileyo" kwingxelo yovavanyo, ungathanda ukubuza: phantsi kweziphi iimeko, ezandleni zikabani, kwaye emva koko zingaphi iintsilelo ezifunyenweyo? Kaloku, ezo mpuphu zimhlophe zithuleyo azithethi, kodwa yonke imikrwelo eziyishiyayo lolona lwimi lunyanisekileyo.