The Cr powder 20 mass - 30 mass after adding, the highest temperature 973 - 1523K,

摘要

PROBLEM TO BE SOLVED: To provide a method for improving the ductility and strength of an NiAl or TiAl intermetallic compound without giving a change to the main structure of NiAl or TiAl by largely adding a third element.;SOLUTION: In the method for improving the ductility and strength of an intermetallic compound, 0 to 30 mass% Cr powder is added to NiAl powder, and thereafter, the Cr-added powdery mixture is sintered by hot isostatic press (HIP) under the conditions where the maximum temperature/maximum pressure/holding time satisfy 973 to 1,523 K/172 to 350 MPa/2 to 4 hr. In the NiAl intermetallic compound obtained by the invention, the tensile strength is 200 to 350 MPa, and the maximum strain is about 10% at 873 K, and the tensile strength is about 200 to 600 MPa, and the maximum strain is about 2% at 673 K.;COPYRIGHT: (C)2005,JPO&NCIPI