|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||428/408 ; 428/212 ; 428/368 ; 428/426 ; 428/428 ; 428/446 ; 428/689 ; 428/669 ; 428/701 ; 428/702 ; 428/704 ; 427/226 ; 427/228 ; 427/379 ; 427/402 ; 264/029.4|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 30 인용 특허 : 23|
This invention describes the infiltration methods used to incorporate ceramic additives in carbon/carbon brake disc preforms. Aqueous vacuum infiltration techniques were employed. Both methods were effective in achieving homogeneous dispersion of ceramic additives throughout brake disc thickness. Heat treatment processes were developed to convert oxide additives to more refractory phases. Both temperature and N.sub.2 overpressure were precisely controlled during conversion. By using the additives, infiltration routes, and heat treatment schedules, brake ...
[ We claim:] [1.] A process of making a carbon/carbon composite friction material member, comprising the steps of:providing a colloidal ceramic solution comprising one of SiO.sub.2 and AlO(OH),controllably infiltrating the colloidal ceramic solution into a carbon/carbon preform,drying the preform,heating the preform to convert the colloidal ceramic to a respective refractory material of SiC and AlN,densifying the preform with elemental carbon to provide the preform with a matrix of carbon, andheat treating the preform to graphitize the carbon/carbon pref...