Optimization of bimodal pom-based binder for powder injection molding
Stringari, Gustavo Beulke ...
Powder injection molding (PIM) is a technology for manufacturing complex, precise, net-shape components from metal or ceramic powder. The potential of PIM lies in its ability to combine the design ...flexibility of plastic injection molding and the nearly unlimited choice of material offered by powder metallurgy. PIM is mostly aimed for manufacturing small complex pieces, ranging from 0.002 to 100 g, at high production volumes. In general, PIM consists of mixing the powder and a polymeric binder, injecting this mixture in a mold with the desired form, debinding and then sintering. Among the debinding techniques applied, catalytic debinding of polyoxzmethylene (POM) stands out due to the high debinding rates and low risk of cracking. Reducing the viscosity of the molten feedstock is of paramount importance in order to facilitate injection molding. However, a compromise should be made in order to prevent a significant loss of the mechanical strength of the solid molded part. This study examines the possibility of using bimodal polyoxymethylene (POM) as the main component of the binding agent by presentingits time-dependent and thermal properties and comparing them to monomodal POM. In addition, possible optimization of the binder formulation was investigated by adding short molecular weight polymeric chains (wax) to bimodal POM. Measurements shown that the magnitude of the complex viscosity for the commercial bimodal material was more than 81% lower than for its monomodal counterpart in the whole range of frequencies studied. A further reduction on viscosity values were observed as the content of short molecular weight polymeric chains was increased, without compromising the thermal and solid mechanical properties of the binder. A new formulation of bimodal POM plus 8wt.% of added wax concentration seems to provide the most appropriate results, lowest viscosity without significantly changing creep compliance values and thermal properties.
Bibliografsko gradivo je bilo uspešno dodano na polico.
Dodajanje bibliografskega gradiva na polico ni uspelo.
Gradivo je že na polici.
Trajna povezava
URL:
Faktor vpliva
Dostop do baze podatkov JCR je dovoljen samo uporabnikom iz Slovenije. Vaš trenutni IP-naslov ni na seznamu dovoljenih za dostop, zato je potrebna avtentikacija z ustreznim računom AAI.
Leto
Faktor vpliva
Izdaja
Kategorija
Razvrstitev
JCR
SNIP
JCR
SNIP
JCR
SNIP
JCR
SNIP
Izberite knjižnično izkaznico:
Baze podatkov,
v katerih je revija indeksirana
Ime baze podatkov
Področje
Leto
Povezave do osebnih bibliografij avtorjev
Povezave do podatkov o raziskovalcih v sistemu SICRIS
Storitev za pridobivanje naslova trenutno ni dostopna, prosimo, poskusite še enkrat.
S klikom na gumb "V redu" boste potrdili zgoraj izbrano prevzemno mesto in dokončali postopek rezervacije.
S klikom na gumb "V redu" boste potrdili zgoraj izbrano prevzemno mesto in naslov za dostavo ter dokončali postopek rezervacije.
S klikom na gumb "V redu" boste potrdili zgoraj izbrani naslov za dostavo in dokončali postopek rezervacije.
Obvestilo
Trenutno je storitev za avtomatsko prijavo in rezervacijo nedostopna. Gradivo lahko rezervirate sami na portalu Biblos ali ponovno poskusite tukaj kasneje.
Citiranje
Funkcionalnost trenutno ni na voljo. Prosimo, poskusite kasneje.
