Chii chinonzi graphitization?
Kugadzira girafiti inzira yeindasitiri umo kabhoni inoshandurwa kuita girafiti. Uku ndiko kuchinja kwechimiro che microstructure kunoitika musimbi dzekabhoni kana dzakaderera dzakasangana nekupisa kwe425 kusvika 550 degrees Celsius kwenguva yakareba, ngatitii maawa chiuru. Iyi imhando ye embrittlement. Semuenzaniso, microstructure yesimbi dzekabhoni-molybdenum inowanzova ne pearlite (musanganiswa weferrite necementite). Kana zvinhu zvagadziriswa girafiti, zvinoita kuti pearlite iore kuita ferrite uye graphite yakapararira zvisina tsarukano. Izvi zvinoguma nekuoma kwesimbi uye kudzikira kwesimba zvishoma kana zvidimbu zvegirafiti izvi zvikagoverwa zvisina tsarukano mukati me matrix yese. Zvisinei, tinogona kudzivirira girafiti nekushandisa zvinhu zvine resistance yakanyanya isinganyanyi kubatwa negirafiti. Pamusoro pezvo, tinogona kugadzirisa nharaunda nekuwedzera pH kana kuderedza chloride content. Imwe nzira yekudzivirira girafiti inosanganisira kushandisa coating. Cathodic protection ye cast iron.
Chii chinonzi carbonization?
Kuisa carbonization inzira yeindasitiri umo zvinhu zvipenyu zvinoshandurwa kuita kabhoni. Zvinhu zvipenyu zvatiri kufunga nezvazvo pano zvinosanganisira zvitunha zvemiti nemhuka. Maitiro aya anoitika nekuparadza. Iyi i pyrolytic reaction uye inoonekwa senzira yakaoma umo maitiro akawanda emakemikari anogona kuonekwa panguva imwe chete. Semuenzaniso, kubvisa hydrogen, condensation, hydrogen transfer uye isomerization. Maitiro ekuisa carbonization akasiyana nemaitiro ekuisa carbonization nekuti carbonization inzira inokurumidza nekuti inokurumidza kuita zvakawanda. Kazhinji, huwandu hwekupisa hunoshandiswa hunogona kudzora mwero wekuisa carbonization uye huwandu hwezvinhu zvekunze zvinosara. Semuenzaniso, huwandu hwekabhoni muzvisaririra hunenge 90% nehuremu pa1200K uye hunenge 99% nehuremu pa1600K. Kazhinji, kuisa carbonization i exothermic reaction, iyo inogona kusiiwa yega kana kushandiswa sesimba pasina kugadzira chero chiratidzo chegasi rekabhoni dioxide. Zvisinei, kana biomaterial ikasangana nekuchinja kamwe kamwe mukupisa (senge mukuputika kwenyukireya), biomaterial ichaisa carbonization nekukurumidza sezvinobvira uye yova kabhoni yakasimba.
Kugadzira girafiti kwakafanana nekugadzira carbonization
Ose ari maviri maitiro akakosha emaindasitiri anosanganisira kabhoni se reactant kana chigadzirwa.
Ndeupi musiyano uripo pakati pe graphitization ne carbonization?
Kugadzira girafiti (graphization) nekugadzira kabhoni (carbonization) maitiro maviri emaindasitiri. Musiyano mukuru pakati pekugadzira kabhoni nekugadzira girafiti ndewekuti kugadzira kabhoni kunosanganisira kushandura zvinhu zve organic kuita kabhoni, nepo kugadzira girafiti (graphitization) kunosanganisira kushandura kabhoni kuita girafiti. Saka, kugadzira kabhoni kuchinja kwemakemikari, nepo kugadzira girafiti kuchichinja kwe microstructure.
Nguva yekutumira: Gunyana-29-2021