Nag hmo, Zhang los ntawm lub chaw kuaj mob tau yws rau kuv dua tias cov ntaub ntawv kuaj cov qauv abrasive yeej ib txwm tsis sib xws. Kuv kov nws lub xub pwg thiab hais tias, "Kwv tij, ua cov kws tshawb fawb txog cov ntaub ntawv, peb tsis tuaj yeem saib cov ntawv qhia xwb; peb yuav tsum tau ntxuav tes thiab nkag siab txog cov yam ntxwv ntawm cov hmoov alumina dawb no." Qhov no muaj tseeb; ib yam li tus kws ua zaub mov paub txog qhov kub thiab txias rau kev ua noj, peb cov neeg kuaj mob yuav tsum "ua phooj ywg" cov hmoov dawb zoo li qub no ua ntej.
Dawb fused alumina micropowder yog paub nyob rau hauv kev lag luam raws li ib tug crystalline daim ntawv ntawmtxhuas oxide, nrog rau Mohs hardness ntawm 9, thib ob tsuas yog pob zeb diamond. Tab sis koj yuav ua yuam kev yog tias koj kho nws zoo li lwm yam khoom siv tawv. Lub hli tas los, peb tau txais peb pawg ntawm cov qauv los ntawm ntau lub tuam txhab tsim khoom. Lawv txhua tus zoo li hmoov dawb dawb, tab sis nyob rau hauv lub tshuab hluav taws xob microscope, lawv txhua tus muaj lawv tus kheej cov yam ntxwv - qee cov khoom muaj cov npoo ntse zoo li cov iav tawg, thaum lwm tus du zoo li xuab zeb zoo nkauj. Qhov no ua rau muaj teeb meem thawj zaug: kev kuaj qhov nyuaj tsis yog qhov kev ua si lej yooj yim.
Feem ntau peb siv lub tshuab ntsuas microhardness, qhov twg koj nias lub indenter thiab cov ntaub ntawv tawm los. Tab sis muaj qee qhov sib txawv: yog tias qhov ceev thauj khoom sai dhau, cov khoom tawg yooj yim yuav tawg tam sim ntawd; yog tias qhov thauj khoom sib zog dhau, koj yuav tsis ntsuas qhov nyuaj tiag tiag. Ib zaug, kuv txhob txwm sim tib cov qauv ntawm ob qhov sib txawv, thiab cov txiaj ntsig sib txawv los ntawm tag nrho 0.8 Mohs hardness units. Nws zoo li kov ib lub txiv tsawb nrog koj cov pob qij txha; siv zog ntau dhau thiab koj tawg nws, tsawg dhau thiab koj tsis tuaj yeem qhia tias nws puas siav. Yog li tam sim no, ua ntej sim, peb yuav tsum "kho" cov qauv hauv qhov kub thiab txias tas li rau 24 teev kom lawv hloov kho rau lub chaw kuaj mob "tus cwj pwm."
Hais txog kev sim tiv thaiv kev hnav, qhov ntawd yog ib qho kev txawj ntse ntxiv. Txoj kev ib txwm muaj yog siv lub log roj hmab txheem los txhuam cov qauv hauv qab qhov siab ruaj khov thiab ntsuas qhov hnav. Tab sis hauv kev xyaum, kuv pom tias txhua 10% nce ntxiv ntawm cov av noo ib puag ncig tuaj yeem ua rau muaj kev hloov pauv ntau dua 5% ntawm qhov hnav. Xyoo tas los thaum lub caij los nag, ib pawg ntawm kev sim rov ua dua tsib zaug qhia cov ntaub ntawv tawg heev, thiab thaum kawg peb pom tias nws yog vim lub tshuab cua txias dehumidification tsis ua haujlwm zoo. Kuv tus thawj saib xyuas hais ib yam dab tsi uas kuv tseem nco qab: "Huab cua sab nraum lub qhov rais lab kuj yog ib feem ntawm cov kev sim."
Qhov nthuav ntxiv yog qhov cuam tshuam ntawm cov duab ntawm cov khoom me me. Cov khoom me me uas muaj lub kaum ntse ntse no yuav lwj sai dua thaum muaj kev thauj khoom tsawg - zoo li rab riam ntse tab sis tawg yooj yim uas tawg thaum txiav cov khoom tawv. Cov khoom me me uas zoo li lub voos xwmfab, uas tau tsim tshwj xeeb los ntawm ib txoj kev tshwj xeeb, ua rau muaj kev ruaj khov zoo kawg nkaus thaum muaj kev thauj khoom mus sij hawm ntev. Qhov no ua rau kuv nco txog cov pob zeb me me ntawm ntug dej ze kuv lub nroog; ntau xyoo ntawm dej nyab tsuas yog ua rau lawv muaj zog dua. Qee zaum, qhov nyuaj tag nrho tsis sib xws rau qhov tawv tsim nyog.
Muaj lwm qhov uas yooj yim tsis quav ntsej hauv cov txheej txheem sim: kev faib tawm qhov loj ntawm cov khoom me me. Txhua tus neeg tsom mus rau qhov nruab nrab ntawm qhov loj ntawm cov khoom me me, tab sis qhov tseeb cuam tshuam rau kev tiv thaiv kev hnav yog feem ntau yog 10% ntawm cov khoom me me thiab cov khoom loj. Lawv zoo li "cov tswv cuab tshwj xeeb" ntawm ib pab pawg; tsawg dhau thiab lawv tsis muaj txiaj ntsig, ntau dhau thiab lawv cuam tshuam kev ua tau zoo tag nrho. Ib zaug, tom qab peb tshuaj xyuas 5% ntawm cov hmoov me me, qhov kev tiv thaiv kev hnav ntawm tag nrho cov khoom siv tau zoo dua 30%. Qhov kev tshawb pom no tau txais kev qhuas los ntawm Old Wang rau ib nrab lub hlis ntawm lub rooj sib tham pab pawg.
Tam sim no, tom qab txhua qhov kev sim, kuv tau tsim ib tus cwj pwm ntawm kev sau cov qauv pov tseg. Cov hmoov dawb los ntawm ntau pawg sib txawv yeej muaj qhov sib txawv me ntsis hauv qab lub teeb; qee qhov yog xiav, qee qhov yog daj. Cov kws tshaj lij paub hais tias qhov no yog qhov qhia txog qhov sib txawv hauv cov qauv siv lead ua, thiab cov kev sib txawv no feem ntau tsuas yog sau tseg ua ib qho me me ntawm cov ntaub ntawv ntsuas. Cov neeg ua haujlwm nrog lawv txhais tes paub tias cov ntaub ntawv muaj lawv tus kheej lub neej; lawv qhia lawv cov dab neeg los ntawm kev hloov pauv me me.
Thaum kawg, kev simdawb corundum micro-hmoovZoo li kev paub ib tug neeg. Cov lej ntawm daim ntawv qhia txog tus kheej (qhov nyuaj, qhov loj ntawm cov khoom me me, qhov huv) tsuas yog cov ntaub ntawv yooj yim xwb; kom nkag siab tiag tiag, koj yuav tsum pom nws qhov kev ua tau zoo nyob rau hauv ntau yam kev nyuaj siab (kev hloov pauv ntawm qhov hnyav), nyob rau hauv ntau yam ib puag ncig (kev hloov pauv kub thiab av noo), thiab tom qab siv ntev (kev sim qaug zog). Lub tshuab kuaj kev hnav khaub ncaws lab daus las hauv chav kuaj mob yog qhov tseeb heev, tab sis qhov kev txiav txim siab zaum kawg tseem nyob ntawm qhov kev paub ntawm kev kov thiab kev ntsia ib pliag - ib yam li tus kws kho tshuab laus uas tuaj yeem qhia qhov tsis ncaj ncees lawm nrog lub tshuab tsuas yog mloog nws lub suab.
Lub sijhawm tom ntej koj pom ib lo lus yooj yim "Kev Nyuaj Siab 9, Kev Tiv Thaiv Kev Hnav Zoo Kawg Nkaus" ntawm daim ntawv qhia kev xeem, tej zaum koj yuav xav nug: nyob rau hauv cov xwm txheej twg, hauv leej twg txhais tes, thiab tom qab ua tsis tiav ntau npaum li cas qhov txiaj ntsig "zoo heev" no tau ua tiav? Tom qab tag nrho, cov hmoov dawb ntsiag to ntawd tsis hais lus, tab sis txhua qhov khawb uas lawv tso tseg yog cov lus ncaj ncees tshaj plaws.