The　grain　boundary　character　distributions　of　sigma2　grain　boundaries　were　investigated　in　WC-Co　samples　with　different　cobalt　volume　fractions.　Specimens　were　prepared　with　cobalt　fractions　of　6　wt%,　8　wt%　and　10　wt%　respectively.　The　electron　backscattered　diffraction　measurements　show　that　with　the　increase　of　the　cobalt　fraction,　the　population　of　sigma2　boundaries　decreases　and　sigma2　twist　boundary　keeps　as　the　most　common　boundary　type.　The　result　suggests　that　the　cobalt　volume　fraction　could　be　determinant　in　controlling　the　population　of　sigma2　grain　boundaries　in　cemented　carbides.　(C)　2013　Elsevier　Ltd　and　Techna　Group　S.r.l.　All　rights　reserved.