Cov yam ntxwv ntawm cov khoom siv txhuas ua npuas ncauj

Aluminium ua npuas ncauj yog tsim los ntawm ib qhoaluminium hlaumatrix khoom thiab pores. Cov txheej txheem ntawm txhuas ua npuas ncauj muaj xws li pore txoj kab uas hla, porosity los yog txheeb ze ntom ntom, pore roundness, thiab tej thaj chaw saum npoo. Kev sib txuas ntawm cov qauv pore tuaj yeem raug cais raws li qhib-cell aluminium ua npuas ncauj thiabkaw-cell aluminium ua npuas ncauj, Lub pore faib ntawm txhuas ua npuas ncauj feem ntau yog random, tab sis cov txheej txheem tshwj xeeb tuaj yeem ua tiav qhov kev faib tawm. Cov duab ntawm qhov pores tuaj yeem yog cov qauv kaw-cell, qhib-cell qauv, lossis sib xyaw ntawm ob qho tib si. Cov pores ntawmqhib-cell aluminium ua npuas ncaujyog kev cob cog rua, thaum lub pores ntawm kaw-cell aluminium ua npuas ncauj yog ywj siab thiab sib cais los ntawm ib leeg kom txhuas ua npuas ncauj yuav suav hais tias yog ib tug sib xyaw khoom ntawm ob theem: lub txhuas matrix thiab lub pores. Kaw-cell qauv: cov phab ntsa pore yog kaw tag nrho rau ib leeg, thiab cov roj yog qhwv hauv qhov pores, uas muaj lub suab zoo thiab cov hluav taws kub rwb thaiv tsev thiab feem ntau yog siv rau hauv lub zog nqus, tiv thaiv kev sib tsoo, thiab lwm yam. Qhib-cell qauv: cov phab ntsa pore txuas nrog, nrog cov huab cua zoo permeability thiab cov kua dej conductivity, haum rau kev pom, cua sov dissipation, thiab lwm yam xwm txheej. Txij li cov txheej txheem ntawm txhuas ua npuas ncauj ncaj qha txiav txim siab qhov kev ua tau zoo ntawm txhuas ua npuas ncauj, nyob rau hauv cov ntaub ntawv siv tau, aluminium foam cov ntaub ntawv uas tsim nyog yuav tsum tau xaiv raws li kev siv sib txawv. Piv nrog rau cov khoom siv hlau tsoos, txhuas ua npuas ncauj yog tus cwj pwm los ntawm qhov pore loj (pore loj D = 0.2 mm txog 8 mm), siab porosity (porosity 63% mus rau 90%), thiab tsawg ntom. Lub skeleton qauv ntawmaluminium ua npuas ncaujqhia txog peb-dimensional reticular tis, muaj cov khoom ntawm aluminium alloy. Qhov no reticulation muab cov khoom zoo heev mechanical zog, xws li lub zog tshwj xeeb thiab zoo zog nqus. Sab nrauv ntawm txhuas ua npuas ncauj feem ntau yog ntxhib nrog pom pores, tab sis qhov zoo ntawm qhov chaw tuaj yeem txhim kho los ntawm kev kho tom qab (xws li, txheej, machining).

Tag nrho cov nyob rau hauv tag nrho, cov yam ntxwv ntawm txhuas ua npuas ncauj yog nws cov porosity, lub teeb yuag thiab siab zog, thiab peb-dimensional reticulated skeleton. Cov khoom siv no txiav txim siab nws daim ntawv thov dav hauv thaj chaw acoustic thiab thermal rwb thaiv tsev, lub zog nqus, cuam tshuam tsis kam, pom, thiab kev tsim kho lub teeb.

Cov yam ntxwv ntawm cov foamed aluminium: (a) qhib-celled foamed aluminium; (b) kaw-celled foamed aluminium