Patent ID: 7273581

Claim:
An improved process for the in-situ preparation of alumina-(Ti, Zr) borides composite which comprises: (i) mixing and milling Ti and Zr metal and their oxides, boron oxide and aluminum, (ii) pelletizing the mixture obtained in step (i) to obtain pellets with a diameter in the range of 10-80 mm and height in the range of 15-20 mm, (iii) igniting the pellets obtained in step (ii) to trigger the in-situ SHS reaction for preparation Al 2 O 3 —(Ti, Zr) boride composite and simultaneous loading of the composite for in-situ densification during SHS under the pressure in the range of 40-200 atmosphere with synthesis time and delay timings varying in the range of 0-180 seconds.