Sains Malaysiana 43(6)(2014):
959–966
Effect of
Nano- and Micro- Reinforced Agents on Dry Sliding Wear of Polyester Composites
(Kesan Agen
Memperteguh Nano-dan Mikro-terhadap Haus
Gelongsor Kering
Komposit Poliester )
CHONG MENG MUN*, CHANG SIANG YEE, NORAIHAM MUHAMMAD,
ZULKIFLI BIN MOHD ROSLI
& QUMRUL AHSAN
Department
of Engineering Material, Faculty of Manufacturing Engineering, Universiti
Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia
Diserahkan: 4
April 2013/Diterima: 10 Januari 2014
ABSTRACT
Dry sliding wear of polyester hybrid
composites containing carboxylic functionalized multi-walled carbon nanotubes (CNT)
and microparticles, silica (SiO2) was studied at different
sliding distances. An attempt has been made to produce uniform dispersion of
nano- and micro- particles in the test samples by ultrasonication. The
tribological properties of the hybrid composites were performed by using
pin-on-disc (POD) tester against grey cast iron countersurface. The dry
sliding wear tests were carried out under pressure-velocity (pv) condition of
0.4 MPa and 4 m/s for total sliding distance of 28800 m and at an interval of
every sliding distance of 3600 m, wear properties and behavior were studied.
The samples containing 10 wt.% silica (microparticles) with and without CNT always
show increase in coefficient of friction at the expense of wear rate. However,
samples containing only CNT have the lowest wear rate with the
increase in coefficient of friction. Sliding distance studies also provide the
information on wear rates which were ever changing at different sliding
distances whereas average coefficient of friction did not vary throughout the
tests. SEM observations of wear surfaces showed different wear
morphologies when reinforcement (CNT or SiO2)
incorporated into the composites either alone or in combination.
Keywords: Carbon nanotubes; silica;
wear behavior
ABSTRAK
Komposit hibrid poliester yang
mengandungi fungsi karbosilik pelbagai dinding karbon tiub nano (CNT)
dan mikropartikel, silika (SiO2) telah dikaji tentang
kehausan gelongsor kering pada beberapa jarak gelongsor. Percubaan serakan
seragam telah dijalankan dengan penggunaan ultrasonikasi untuk menyerakkan
nano- dan mikro- partikel dalam komposit. Ciri tribologikal komposit hibrid
telah dijalankan dengan menggunakan penguji pin atas cakera (POD)
terhadap permukaan kaunter besi tuang kelabu. Ujian haus gelongsor kering telah
dijalankan dalam keadaan gelongsor yang mempunyai daya tekanan 0.4 MPa dan
halaju 4 m/s bagi jumlah jarak gelongsor sebanyak 28800 m pada jarak gelongsor
setiap 3600 m. Sampel yang mengandungi 10 %.bt silika (mikropartikel) dengan
atau tanpa CNT sentiasa menunjukkan peningkatan dalam pekali geseran
dan kadar haus. Walau bagaimanapun, sampel yang mengandungi CNT sahaja
mempunyai ketahanan haus yang terendah dan pekali geseran tertinggi dalam
ketiga-tiga komposit. Kajian pada jarak gelongsor juga menunjukkan bahawa kadar
haus sentiasa berubah pada jarak gelongsor yang berbeza manakala pekali geseran
tidak mempunyai perbezaan yang ketara sepanjang ujian. Cerapan SEM pada
permukaan haus menunjukkan morfologi yang berbeza apabila poliester bergabung
dengan satu jenis partikel (CNT atau silika) atau kedua-dua
jenis partikel (CNT dan silika).
Kata kunci: Haus; karbon tiub nano;
silika
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*Pengarang untuk
surat-menyurat; email: cmm@student.utem.edu.my
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