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, matrix 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 ihe na-eme ka ọkpụkpụ na-eme ka ọ dịkwuo mma, n'ihi ya, a ga-agwọrịrị brazing elu nke ihe mejupụtara ma ọ bụ mee ka ọ rụọ ọrụ filler metal, na a ga-eji ọkụ brazing 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 n'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 metal ntọala, a pụrụ iji akwa mkpuchi mkpuchi mkpuchi aluminum dị ọcha kpuchie ya na brazing elu nke ihe mejupụtara, ma ọ bụ b-al64simgbi (11.65i-15mg-0.5bi) brazing filler metal na obere brazing ike nwere ike họrọ. Oke ọkụ na-agbaze nke brazing filler metal bụ 554 ~ 572 ℃, brazing okpomọkụ nwere ike ịbụ 580 ~ 590 ℃, brazing oge bụ 5min, na shiee ike nke nkwonkwo karịrị 80mpa.

Maka ihe mejupụtara matriks aluminom graphite gbasiri ike, ịgbanye ọkụ n'ọkụ ikuku bụ usoro kacha 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.