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Electron Beam Sintering of Zirconium Diboride

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Electron beam sintering of ultra-high-temperature ceramic material of zirconium diboride (ZrB2) was successfully carried out. Scanning electron microscopy images showed that the sintered layer had smooth surface morphology. Significant grain growth was observed by increasing the electron beam current density. More uniform and finer microstructures could be obtained using high beam currents and short dwell times. Chemical composition analysis confirmed that sintering in a vacuum environment could minimize boron loss. X-ray diffraction results revealed that the sintered layer mainly preserved the crystalline phase from the starting powder.
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Document Type: Research Article

Affiliations: 1: Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia 22904 2: NASA Langley Research Center, Hampton, Virginia 23681

Publication date: 2010-09-01

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