Description: The beryllium compounds NbBe/sub 12/, YBe/sub 13/, and ZrBe/sub 12/ were prepared by arc melting. Some beryllium was lost in this operation but sound ingots were obtained. The hardness, density, metallographic structure, x-ray structure, and oxidation resistance in air of each ingot were determined. The zirconium compound apparently had a tetragonal structure corresponding to ZrBe/ sub 12/ and a hardness of 790 Knoop and a density of 2.94 g per cm/sup 3/. The yttrium compound had a cubic structure corresponding to YBe/sub 13/ and a hardness of 570 Knoop and a density of 2.57 g per cm/sup 3/. The niobium compound had a tetragonal structure corresponding to NbBe/sub 12/ and a hardness of 1100 Knoop and a density of 3.14 g pre cm/sup 3/. The zirconium alloy was most difficult to prepare and crumbled at 700 deg C during oxidation testing. The niobium and yttrium alloys were both relatively easy to prepare and both were highly resistant to oxidation at 1300 deg C. The niobium alloy had the most satisfactory behavior in all respects and appears most promising for further development. (auth)
Date: March 1, 1959
Creator: Chubb, W. & Dickerson, R.F.
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Partner: UNT Libraries Government Documents Department