This study reports the effects of reinforcement content (2, 5 and 10 wt%) and sequential milling on the microstructural, physical and mechanical properties of the TiB2 particulate-reinforced Al-12.6 wt% Si metal matrix composites (MMCs) prepared starting from Al, Si and TiB2 elemental powders. Sequential milling process included two different kinds of high-energy ball milling such as mechanical alloying (MA) and cryomilling (CM). MA experiments were carried out at room temperature for 4 h using a Spex™ 8000D Mixer/Mill. Subsequent CM experiments were conducted with externally circulated liquid N 2 for 10, 20 and 30 min using a Spex™ 6870 Freezer/Mill. Milled powders were compacted by cold uniaxial pressing under a pressure of 450 MPa and then by cold isostatic pressing (CIP) under 400 MPa. The green bodies were sintered at 570 °C for 2 h under Ar atmosphere. Characterization investigations of the samples were performed using X-ray diffractometer (XRD), TOPAS software, scanning electron microscope/energy-dispersive spectrometer (SEM/EDS) and particle size analyzer (PSA). Sintered samples were also characterized in terms of Archimedes density, Vickers microhardness and relative wear resistance. Composites sintered from the mechanically alloyed (MA’d) and 20 min of cryomilled (CM’d) powders exhibited the higher microhardness values than those of other sintered samples. Wear rates of the sintered samples slightly increased with increasing CM time. At a constant CM time of 20 min, wear rates incredibly decreased as TiB2 content increased.
Journal of Materials Science – Springer Journals
Published: Oct 20, 2017
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera