Design and Fabrication of W-Mg Graded Density ImpactorReport as inadecuate




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In order to simulate the influence of high-speed movement space debris on the spacecraft, a graded density impactor is needed to collide with the secondary flier-plate, so that its speed can approach that space debris. In this paper,a methodology is described for fabrication of W-Mg functionally graded materials with density gradient,using metal W and Mg powder as row materials, according to the designed ratio of mixed powder, mixture powders were layered into mold and uniaxially pressed together, finally, sintered under hot isostatic pressing . The impactor’s Surface morphology from the magnesium-rich side to the tungsten-rich side can be observed by SEM, the results show that regular shaped tungsten particles were bonded together by magnesium, through energy spectrum analysis can be seen that W-Mg content showed gradient trend along the thickness direction.

KEYWORDS

graded impactor materials; design; fabrication; SEM

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Author: A-ting Gao, De-gui Zhu

Source: http://www.scirp.org/



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