Wyniki wyszukiwania - BazTech

1

Własności i morfologia powierzchni spieków z proszku brązu

Szczepanik S., Wiśniewska-Weinert H., Nikiel P., Wiśniewski T., Wojtaszek M.

Rudy i Metale Nieżelazne

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2012

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R. 57, nr 8

512-517

PL

Opracowano własności spieków brązu takie jak gęstość, wytrzymałość na ściskanie i skurcz oraz morfologię powierzchni i przełomy w zależności od nacisku jednostkowego prasowania. Otrzymano materiały o rozwiniętej powierzchni, z otwartą porowatością, pozwalającą na wprowadzenie do materiału cząsteczek smarnych.

EN

Some properties of sintered bronze such as density, compression strength as well as linear dimension change, morphology and destruction surface were investigated. The developed outer surface of the obtained materials was identified. Open porosity in the shape of channels appears. It is needed for infiltration with lubricant particles.

2

The friction and wear characteristics and the deformation of bronze powder-filled PEEK/PTFE blends in oscillating motion

Takahashi H., Saito A.

International Journal of Applied Mechanics and Engineering

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2002

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Vol. 7, Spec. is

433-439

EN

A study was made on polymer based composite materials, which are usable without lubrication as sliding members of oscillating motion components which are difficult to lubricate with oil. In this study, polyetheretherketone (PEEK) was used as a matrix, was blend with polytetrafluoroethylene (PTFE) which is a friction-reducing material. Friction and wear characteristics of each specimen in oscillating motion and continuous rotation were studied. As a result, the wear of pure PEEK in oscillating motion was about 20 times that in continuous rotation, but the wear of PTFE blended PEEK in oscillating motion was improved about 3 times that in continuous rotation. And the wear of PTFE blended specimens reduced to about 1/50 that of pure PEEK in oscillating motion and about 1/2 in continuous rotation. When PTFE blended PEEK was filled with bronze particles, wear was even further reduced in oscillating motion and also in continuous rotation. Coefficient of friction of pure PEEK in oscillating motion was greater than that in continuous rotation. When PEEK was blended with PTFE, coefficients of friction were reduced to such an extent as to eliminate differences in friction characteristics according to the direction of motion. Further, pv limits of pure PEEK in oscillating motion were extremely small compared to those in continuous rotation. When PEEK was blended with PTFE, pv limits were improved in oscillating motion and also in continuous rotation.

3

Spiekane filtry mikroporowate z proszku stali kwasoodpornej i proszku brązu.

Cegielski W., Czepelak M.

Rudy i Metale Nieżelazne

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1999

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R. 44, nr 1

33-35

PL

Opracowana technologia umożliwia wytwarzanie elementów filtrujących spiekanych, o wielkości porów poniżej 5 mikrometrów, wykonanych z proszku stali nierdzewnej oraz z proszku brązu. Przedstawiono technologie wytwarzania oraz wyniki badań spiekanych filtrów mikroporowatych. Filtry otrzymywano metodą przez prasowanie z dodatkiem substancji wiążącej w postaci parafiny i spiekanie wyprasek połączone z odpędzeniem dodanych substancji lotnych.

EN

The elaborated technology enables production of sintered filter elements of stainless steel powder and bronze powder with pores diameter below 5 micrometres. There are shown the technologies of production and study results of the sintered microporous filters. The filters were produced by pressing, with addition of paraffin as binding substance and sintering of the compacts with simultaneous expelling of the added volatile matter.