Details

Autor(en) / Beteiligte

• YAMADA, Suzuya
• HIRAO, Kiyoshi
• YAMAUCHI, Yukihiko
• KANZAKI, Shuzo
• WCA

Titel

B4C-CrB2 composites with improved mechanical properties

Ist Teil von

• Journal of the European Ceramic Society, 2003-03, Vol.23 (3), p.561-565

Ort / Verlag

Oxford: Elsevier

Erscheinungsjahr

2003

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• B4C based ceramic composites with 0-25 mol% CrB2 were fabricated by hot-pressing at 1900 deg C, and their mechanical properties were examined. The B4C-CrB2 composites with both high strength of 630 MPa and modest fracture toughness of 3.5 MPa m exp 1/2 could be obtained by the addition of 20 mol% CrB2. It seems that improvement in fracture toughness is due to the formation of microcracks and deflection of propagating cracks caused by the thermal expansion mismatch between CrB2 and B4C.