Author: Miles E. Tyrrell

Publisher:

Published: 1964

Total Pages: 22

ISBN-13:

Mixtures of zirconium diboride and refractory metals of group VI were resistance sintered to high-density compacts using modified electric welding equipment. To evaluate the use of chromium, molybdenum, or tungsten as binders for zirconium diboride the sintered compacts were examined in polished sections and tested for crushing strength, hardness, microhardness, oxidation rate, and resistance to mechanical shock. Chromium yielded the highest compressive strength, the greatest resistance to mechanical shock and oxidation, and a satisfactory Rockwell hardness. Molybdenum did not yield a satisfactory cermet. Tungsten yielded compacts having a high microhardness but a very low mechanical strength.