Load-dependent indentation behavior ofβ-SiAlON andα-silicon carbide

查看全文 作　　者：Prasenjit [1]BARICK;Dulal Chandra [1]JANA;Bhaskar Prasad [1]SAHA

机构地区：[1]Centre for Non-Oxide Ceramics,International Advanced Research Centre for Powder Metallurgy and New Materials,PO:Balapur,RCI Road,Hyderabad 500005,Andhra Pradesh,India

出　　处：《Journal of Advanced Ceramics》索引2013年第2卷第2期,共8页

摘　　要：A comparative study was carried out on the load-dependent indentation behavior with respect to hardness and induced cracks ofβ-SiAlON andα-silicon carbide ceramics.It is observed that silicon carbide(SiC)exhibits lower transition load,early cracking and severely crushed indentation sites,whereasβ-SiAlON shows higher transition load and damage-free indentation zone even at the maximum applied load(294.19 N).Crack density is higher forα-SiC with comparison toβ-SiAlON at each load.SiC exhibits both main and secondary radial types of cracking from low indentation load(0.98 N).Cracks are often associated with branching at higher load(>9.80 N)forα-SiC.β-SiAlON exhibits cracks which are mainly radial types initiated at 4.90 N load.These opposing behaviors ofβ-SiAlON andα-SiC are attributed to their difference in hardness,toughness,and brittleness index.Higher brittleness ofα-SiC results in early and severe cracking around its indentations.β-SiAlON shows less cracking due to its lower brittleness and higher toughness.The increased size of indentation-induced cracks ofα-SiC is higher than that ofβ-SiAlON due to the rapid crack propagation inα-SiC with transgranular fracture behavior. 关键词：SIALON silicon carbide(SiC) INDENTATION HARDNESS CRACK

相关文献

参考文献（23）
引证文献（1）
耦合文献（0）

参考文献(23)

引证文献(1)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Load-dependent indentation behavior ofβ-SiAlON andα-silicon carbide

参考文献(23)

引证文献(1)

用户提示