Mgbochi nke Aluminom Matrix Composites

(1) Njirimara brazing aluminom matrix composites na-agụnyekarị urughuru (gụnyere whisker) nkwado na nkwado fiber.Ihe eji eme nkwado gụnyere B, CB, SiC, wdg.

Mgbe aluminom matrix composites na-brazed na kpụ ọkụ n'ọnụ, matriks Al dị mfe imeghachi omume na agba ume na-adọ, dị ka ngwa ngwa mgbasa nke Si na filler metal na isi metal na guzobe kenkuwa dumping oyi akwa.N'ihi nnukwu ọdịiche dị na ọnụọgụ mgbasawanye linear n'etiti Al na agba ume, ikpo ọkụ na-adịghị mma ga-eme ka nrụgide okpomọkụ dị na interface, nke dị mfe ime ka nkwonkwo nkwonkwo.Tụkwasị na nke ahụ, mmiri dị n'etiti igwe na-eme ka ihe na-eme ka ọkpụkpụ na-eme ka ọ dịkwuo mma adịghị mma, ya mere a ghaghị ịgwọta ihu brazing nke ihe mgbagwoju anya ma ọ bụ mee ka ọ rụọ ọrụ filler metal, na a ga-eji brazing na-ekpo ọkụ mee ihe dị ka o kwere mee.

(2) Brazing ihe na usoro B ma ọ bụ SiC urughuru mesi aluminom matrix composites nwere ike ịbụ brazed, na elu ọgwụgwọ tupu ịgbado ọkụ nwere ike mere site sandpaper egweri, waya ahịhịa ihicha, alkali ịsacha ma ọ bụ electroless nickel plating ( mkpuchi ọkpụrụkpụ 0.05mm).Igwe nkpuchi bụ s-cd95ag, s-zn95al na s-cd83zn, nke ọkụ oxyacetylene dị nro na-ekpo ọkụ.Na mgbakwunye, enwere ike nweta ike nkwonkwo dị elu site na ịcha brazing na s-zn95al solder.

Enwere ike iji brazing Vacuum maka njikọ nke Short Fiber Reinforced 6061 aluminum matrix composites.Tupu brazing, elu ga-eji 800 abrasive akwụkwọ egweri mgbe egweri, wee brazed n'ime ọkụ mgbe ultrasonic ihicha na acetone.A na-ejikarị Al Si brazing filler metal.Iji gbochie mgbasa nke Si n'ime isi metal, a oyi akwa nke ọcha aluminum foil mgbochi oyi akwa nwere ike ntekwasa n'elu brazing elu nke mejupụtara ihe mejupụtara, ma ọ bụ b-al64simgbi (11.65i-15mg-0.5bi) brazing filler metal na. Enwere ike ịhọrọ ike brazing dị ala.Ọnọdụ okpomọkụ na-agbaze nke metal brazing filler bụ 554 ~ 572 ℃, brazing okpomọkụ nwere ike ịbụ 580 ~ 590 ℃, oge brazing bụ 5min, na ike shiee nke nkwonkwo karịrị 80mpa.

Maka ihe ndị mejupụtara matriks aluminom mesiri ike graphite, brazing n'ime ọkụ ikuku na-echebe bụ usoro kachasị aga nke ọma ugbu a.Iji mee ka mmiri dị mma, a ga-ejirịrị Al Si solder nwere mg.

Dị ka ọ dị na aluminom vacuum brazing, wettability nke aluminom matrix composites nwere ike imeziwanye nke ọma site na iwebata mg vapor ma ọ bụ Ti suction na ịgbakwunye ụfọdụ ego Mg.