A por tulajdons\u00e1gainak \u00e9s az adal\u00e9kanyagok hat\u00e1sa az anyagok s\u0171r\u00edt\u00e9si szinterez\u00e9s\u00e9re: az eredeti b\u00f3rkarbid por szemcsem\u00e9rete, a szemcsem\u00e9ret-eloszl\u00e1s, a porszemcs\u00e9k alakja, a tisztas\u00e1g stb. nagyobb hat\u00e1ssal van a b\u00f3rkarbid ker\u00e1mia szervez\u00e9s\u00e9re \u00e9s tulajdons\u00e1gaira. A fel\u00fcleti energia cs\u00f6kkent\u00e9se a ker\u00e1mia szinterez\u00e9s\u00e9nek hajt\u00f3ereje. Min\u00e9l kisebb a por r\u00e9szecskem\u00e9rete , ann\u00e1l nagyobb a fajlagos fel\u00fclet, ann\u00e1l nagyobb a szinterez\u00e9s hajt\u00f3ereje, m\u00edg min\u00e9l finomabb a por, ann\u00e1l t\u00f6bb szerkezeti hiba keletkezik az el\u0151k\u00e9sz\u00edt\u00e9si folyamatban, nagy szinterel\u00e9si aktivit\u00e1s, ami el\u0151seg\u00edtheti a szinterez\u00e9st \u00e9s a s\u0171r\u00edt\u00e9st. A tiszta B4C-t \u00e1ltal\u00e1ban szil\u00e1rd f\u00e1zis\u00fa szinterez\u00e9ssel szinterezik, amelynek magas szinterel\u00e9si h\u0151m\u00e9rs\u00e9klete \u00e9s sz\u0171k szinterel\u00e9si h\u0151m\u00e9rs\u00e9klettartom\u00e1nya van. Meg\u00e1llap\u00edtott\u00e1k, hogy a szemcsehat\u00e1rok aktiv\u00e1l\u00e1sa \u00e9s az \u00f6mlesztett diff\u00fazi\u00f3 jav\u00edthat\u00f3 szinterel\u00e9si adal\u00e9kanyagok hozz\u00e1ad\u00e1s\u00e1val, hogy n\u00f6velj\u00e9k a ponthib\u00e1k vagy diszlok\u00e1ci\u00f3k s\u0171r\u0171s\u00e9g\u00e9t.
\nA B4C forr\u00f3nyom\u00e1sos szinterez\u00e9se: A B4C nyom\u00e1s n\u00e9lk\u00fcli szinterez\u00e9se \u00f6sszetett alak\u00fa term\u00e9kek el\u0151\u00e1ll\u00edt\u00e1s\u00e1ra haszn\u00e1lhat\u00f3, de hajlamos a szemcs\u00e9k t\u00faln\u00f6veked\u00e9s\u00e9hez \u00e9s 3-7Vol.% porozit\u00e1shoz vezetni, \u00edgy az anyag szil\u00e1rds\u00e1ga \u00e9s sz\u00edv\u00f3ss\u00e1ga alacsony.
\nA B4C forr\u00f3 izosztatikus nyom\u00e1son t\u00f6rt\u00e9n\u0151 szinterez\u00e9se: A b\u00f3rkarbid ker\u00e1mia forr\u00f3 izosztatikus nyom\u00e1son (HIP) t\u00f6rt\u00e9n\u0151 szinterez\u00e9se lehet\u0151v\u00e9 teszi az adal\u00e9kanyagok n\u00e9lk\u00fcli s\u0171r\u00edt\u00e9st, valamint a finom szemcs\u00e9s mikroszerkezetek \u00e9s a nagy hajl\u00edt\u00f3szil\u00e1rds\u00e1g el\u00e9r\u00e9s\u00e9t. Sikeres haszn\u00e1lata speci\u00e1lis b\u00f3r-oxid \u00fcveg bor\u00edt\u00e9k t\u00f6lt\u00f6tt szubmikronos tiszta B4C por, 1700 \u2103 felett, 200MPa nyom\u00e1s szigetel\u00e9s 60 percig, a relat\u00edv s\u0171r\u0171s\u00e9ge a termel\u00e9s 100% b\u00f3r-karbid ker\u00e1mia, a h\u00e1rompontos hajl\u00edt\u00e1si szil\u00e1rds\u00e1g 714MPa, Weber \u00e9rint\u00e9si sz\u00e1m m 8,3. F\u00e9m bor\u00edt\u00e9k eset\u00e9n a B4C boml\u00e1sa a f\u00e9mboridok \u00e9s a grafit kialakul\u00e1sa, a bor\u00edt\u00e9k t\u00f6r\u00e9kenny\u00e9 v\u00e1lik. Ezenk\u00edv\u00fcl a b\u00f3r-oxid g\u00e1z egyszerre szabadulhat fel a burkolatb\u00f3l \u00e9s a mint\u00e1b\u00f3l, \u00edgy a burkolat megrepedhet. Ez\u00e9rt \u00e1ltal\u00e1ban nyom\u00e1s n\u00e9lk\u00fcli szinterez\u00e9st v\u00e9geznek, hogy nyitott v\u00e9g\u0171 g\u00e1zlyukak n\u00e9lk\u00fcli B4C-t kapjanak, majd forr\u00f3 izosztatikus pr\u00e9sel\u00e9st alkalmaznak a marad\u00e9k z\u00e1rt v\u00e9g\u0171 g\u00e1zlyukak megsz\u00fcntet\u00e9se \u00e9s a teljes s\u0171r\u0171s\u00f6d\u00e9s el\u00e9r\u00e9se \u00e9rdek\u00e9ben, 1950-2050 \u00b0C k\u00f6z\u00f6tti forr\u00f3 izosztatikus pr\u00e9sel\u00e9si h\u0151m\u00e9rs\u00e9kleten.<\/p>","protected":false},"excerpt":{"rendered":"
The influence of powder properties and additives on the densification sintering of materials: the particle size of the original boron carbide powder, the particle size distribution, the shape of the powder particles, the purity, etc. have a greater impact on the organization and properties of boron carbide ceramic. The reduction of surface energy is the… Read More »Borkarbid ker\u00e1mia s\u0171r\u00edt\u00e9si szinterez\u00e9si technol\u00f3gi\u00e1ja<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[6],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/posts\/193"}],"collection":[{"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/comments?post=193"}],"version-history":[{"count":1,"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/posts\/193\/revisions"}],"predecessor-version":[{"id":194,"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/posts\/193\/revisions\/194"}],"wp:attachment":[{"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/media?parent=193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/categories?post=193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/advance-ceramics.com\/hu\/wp-json\/wp\/v2\/tags?post=193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}