%0 Journal Article
%T Low Shear Strength and Shear-Induced Failure in Ti3SiC2
%A Yiwang BAO
%A Yanchun ZHOU
%A <br>YiwangBAO
%A YanchunZHOU
%J 材料科学技术学报
%D 2003
%I 
%X Shear strength and shear-induced Hertzian contact damage in Ti_3SiC_2 were investigated using double-notched-beam specimen and steel spherical indenter, respectively. The shear strength of 40 MPa that was only about 10% of bending strength was obtained for this novel ceramic. The SEM fractograph of specimens failed in shear test indicated a combination of intergranular and transgranular fracture. Under a contact load, plastic indent without cone crack could be formed on the surface of Ti3SiC2 sample. Optical observation on side view showed half-circle cracks around the damage zone below the indent, and the crack shape was consistent with the contrail of the principal shearing stress. The low shear strength and the shearing-activated intergranular sliding were confirmed being the key factors for failure in Ti3SiC2.
%K Ti_3SiC_2
%K Shear strength
%K Contact damage
%K Double-notched specimen<br>切变强度
%K Ti3SiC2
%K 接触破损
%K 弯曲强度
%K 结构材料
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=A8487417BAC7EF36&yid=D43C4A19B2EE3C0A&vid=2A8D03AD8076A2E3&iid=38B194292C032A66&sid=2BA123C6EB9D54C2&eid=1E41DF9426604740&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=15