Journal
COMPOSITES PART B-ENGINEERING
Volume 174, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2019.107041
Keywords
Metal-matrix composites (MMCs); Mechanical properties; Fracture; Impact behavior
Funding
- National Research Foundation of Korea grant - Ministry of Science, ICT, and Future Planning, Korea [2014M3C1A9060722]
- Brain Korea 21 PLUS Project for Center for Creative Industrial Materials
- National Research Foundation of Korea [2014M3C1A9060722] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, a hybrid Al-matrix composite reinforced with both SiC and B4C ceramic particulates (SiCp or B4Cp, respectively) was fabricated to increase the volume fraction of ceramics by a liquid pressing process, and its dynamic and ballistic properties were compared with those of monolithic Al-matrix composites reinforced with SiC or B4Cp. The hybrid composite demonstrated a very high dynamic compressive strength (over 1.5 GPa), along with a good total strain of 11.7%, which readily reached an undiscovered strength area (far over 1.2 GPa) of typical composites. This was basically attributed to the highest ceramic fraction (60 vol%), together with strongly-bonded ceramic/Al interfaces and synergetic hybrid effects of SiC(p)s and B(4)C(p)s. After the ballistic test, the hybrid composite was radially cracked with a small hole-mark and a few fallen-off debris, which indicated the higher ballistic properties than those of the SiCp- or B4Cp-reinforced composite because of outstanding dynamic compressive strength and strain.
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