新型陶瓷刀具材料JX－2－Ⅰ组合增韧补强机理的实验研究

Study on the Synergistic Mechanisms of Toughening and Strengthening for Advanced Ceramic Tool Material JX-2-Ⅰ

本文研究了新型陶瓷刀具材料ＪＸ－２－Ⅰ（Ａｌ＿２Ｏ＿３／ＳｉＣｐ／ＳｉＣｗ）的力学性能，同Ａ（Ａｌ＿２Ｏ＿３）、ＡＰ（Ａｌ＿２Ｏ＿３／ＳｉＣｐ）、ＡＷ（Ａｌ＿２Ｏ＿３／ＳｉＣｗ）和Ｊｘ－１（Ａｌ＿２Ｏ＿３／ＳｉＣｗ）材料相比，ＪＸ－２－Ⅰ具有较高的抗弯强度（σ＿（ｂｂ））和断裂韧性Ｋ＿（Ｉｃ）；研究结果表明，在ＪＸ－２－Ⅰ陶瓷刀具材料中确实存在增韧补强的协同作用，陶瓷刀具材料ＪＸ－２－Ⅰ的主要增韧机理是界面解离、裂纹偏转和晶须拔出。

The mechanical properties of advanced ceramic tool material JX-2-Ⅰ(Al_2O_3/SiCp/SiCw)have been stud-ied.Compared with the mechanical properties of A ( Al_2O_3),AP(Al_2O_3/SiCp),AW(Al_2O)3/SiCw ) and JX-1(Al_2O_3/SiCw), JX-2-Ⅰ has the advantage of high bending strength(σbb)and fracture toughness(K_(IC)). It is shownthat there are synergisms of both toughening and strengthening in JX-2-Ⅰ.The main toughening mechanisms ofJx-2-Ⅰ are interface debonding,crack deflection and whisker pull-out。