For a high-temperature gas turbine application, you have chosen to use alumina ceramic material for a non-rotating part that is subject to modest forces. You find that you can save a significant amount of money by buying alumina that is of 1% lower density than more-expensive alumina, and in aircraft design saving weight is always desired. What aspect of the defect structure of the cheaper alumina should you investigate to determine its possible effects on mechanical properties, and why may this be important?
What will be an ideal response?
The lower density results from voids in the ceramic. Voids reduce the resistance to fracture in brittle ceramic materials.
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A quantity that has both a magnitude and direction associated with it is called a __________
Fill in the blank(s) with correct word