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Atomic fluorescence method for measuring selenium and tellurium in high-temperature alloy FGH96

A technology of atomic fluorescence and high-temperature alloys, applied in fluorescence/phosphorescence, preparation of test samples, material excitation analysis, etc., can solve the problems of low analysis precision, high cost, interference, etc., and achieve the effect of good selectivity and high sensitivity

Inactive Publication Date: 2014-01-29
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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Problems solved by technology

However, when ICP-MS analyzes the low melting point elements selenium and tellurium in FGH96, there are problems of high cost and serious interference; when AAS analyzes the low melting point elements selenium and tellurium in FGH96, there are problems of serious interference and low analysis accuracy

Method used

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Embodiment 1

[0056] 1. Determination of atomic fluorescence technology of selenium and tellurium in superalloy FGH96, characterized in that: atomic fluorescence spectrometer is used, and the working conditions of the element selenium instrument are as follows: photomultiplier tube negative high voltage: 360V; atomizer height: 8mm; lamp current: 80mA; carrier gas flow: 400ml / mim; shielding gas flow: 900ml / mim. The measurement conditions for elemental selenium are as follows: reading time: 10s; measuring method: standard curve method; delay time: 1s; reading method: peak area integration; repetition times: 1 time. The working conditions of the element tellurium instrument are as follows: photomultiplier tube negative high voltage: 300V; atomizer height: 8mm; lamp current: 80mA; carrier gas flow rate: 400ml / mim; shielding gas flow rate: 900ml / mim. The measurement conditions for element tellurium are as follows: reading time: 10s; measurement method: standard curve method; delay time: 1s; readin...

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Abstract

The invention belongs to an alloy trace element analysis technology and relates to a method for measuring selenium and tellurium in a high-temperature alloy FGH96. The method comprises the analysis steps of weighing a test material; preparing a test sample solution; preparing a calibration solution; preparing a low-standard solution; preparing a high-standard solution; measuring the concentration of selenium and the concentration of tellurium in the test sample solution; and calculating according to measured results to obtain the content of selenium and the content of tellurium. The hydride generation atomic fluorescence method provided by the invention is used for measuring the selenium content and the tellurium content in the high-temperature alloy and is high in analysis sensitivity, easy to operate, short in analysis period and high in efficiency. The atomic fluorescence method has wide application prospect and can meet the trend that along with the engineering application of the alloy FGH96, a requirement on the impurity element content is more and more strict, and particularly, the impurities such as selenium and tellurium are controlled strictly. The method can meet requirements of scientific research and production on the quality control of raw materials, reduce the rejection rate of products, and save the development and production costs.

Description

technical field [0001] The invention belongs to alloy trace element analysis technology, and relates to a method for measuring selenium and tellurium contents in superalloy FGH96. Background technique [0002] In response to the engine's demand for high thrust-to-weight ratio, the powder superalloy FGH96 is used in the key hot end parts of the engine. In order to improve the purity level of the disc alloy, it is necessary to strictly control the content of impurity elements in the alloy, especially the content of low melting point elements selenium and tellurium, so as to improve the safety and reliability of engine operation. . [0003] According to literature research, atomic fluorescence technology is an analysis technology with Chinese characteristics, and there is no relevant analysis content in ASTM and foreign literature. The analysis methods of trace elements in superalloys mainly include the methods provided by the national military standard GJB5404, among which a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N1/28G01N1/38G01N1/44
Inventor 高颂庞晓辉杨峥张艳房丽娜
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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