Abstract

It has been known that certain trace elements have a deleterious effect on the physical properties of nickel- and cobalt-based superalloys at elevated temperatures. One of these elements, bismuth, has been known to cause this phenomenon at a level above 1 μg/g. As a result, this laboratory has had to develop a method to analyze accurately for this metal at a level of from 0.1 to 1 μg/g to insure control below 0.5 μg/g. The technique arrived at utilizes a cathodic electrodeposition to preconcentrate the bismuth prior to analysis by atomic absorption spectrophotometry. The electrodeposition process involves preplating a platinum cathode with copper and then coplating the bismuth with additional amounts of copper. The sample resulting from this process is compared to a series of standards containing equal amounts of copper and HNO₃ to eliminate any interferences.

Optical fiber sensor and assembly method for measuring the tensile strain of a nickel-based directionally solidified superalloy in a high-temperature environment

Zhixun Wen, Yating Liu, Jundong Wang, Yeda Lian, Changsheng Ai, and Xuguang Zheng
Appl. Opt. 61(26) 7579-7586 (2022)

Determination of the absorption coefficient of chromophoric dissolved organic matter from underway spectrophotometry

Giorgio Dall’Olmo, Robert J. W. Brewin, Francesco Nencioli, Emanuele Organelli, Ina Lefering, David McKee, Rüdiger Röttgers, Catherine Mitchell, Emmanuel Boss, Annick Bricaud, and Gavin Tilstone
Opt. Express 25(24) A1079-A1095 (2017)

Determinations of trace boron in superalloys and steels using laser-induced breakdown spectroscopy assisted with laser-induced fluorescence

Changmao Li, Zhongqi Hao, Zhimin Zou, Ran Zhou, Jiaming Li, Lianbo Guo, Xiangyou Li, Yongfeng Lu, and Xiaoyan Zeng
Opt. Express 24(8) 7850-7857 (2016)

Derivative Absorption and Emission Spectrophotometry

F. Grum, D. Paine, and L. Zoeller
Appl. Opt. 11(1) 93-98 (1972)

Reflectance Spectra of the Copper-Bismuth Alloy System*

F. Vratny, J. J. Kokalas, and F. Gugliotta
J. Opt. Soc. Am. 51(6) 644-647 (1961)