Manufacturing of Mo-25 Re and Mo-50 Re Alloys by Means of Powder Sintering at Medium Temperatures
Manufacturing of Mo-25 Re and Mo-50 Re Alloys by Means of Powder Sintering at Medium Temperatures
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DOI：
10.1080/10426919808935295
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发表时间：
1998-09
影响因子：
4.8
通讯作者：
J. Garin;R. Mannheim
中科院分区：
文献类型：
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作者：
J. Garin;R. Mannheim
摘要采用钼和铼的混合粉末在不同温度下烧结制备了Mo-25% Re和Mo-50% Re合金。为此，首先将平均粒度为1至5 μ m的组分粉末金属的化学计量混合物在行星式磨机中均质化，然后在300、400、500和600 MPa下压制成片剂和小坯料的形状，用于轧制成薄箔。在氩-氢保护气氛下，在1400至1700 ° C范围内的各种温度下对所获得的片进行烧结。通过X射线衍射跟踪钼基体中的Al2O3的固溶体。结果表明，在所有烧结温度下，Mo-25% Re合金中的Al2O3均完全溶解，而Mo-50% Re合金中则有少量的中间相存在，与相应的相图相吻合。烧结件的致密化随着温度和压制压力的增加而增加，直到小于9 ℃的值。
Abstract Powder mixtures of molybdenum and rhenium were sintered at various temperatures to fabricate Mo-25% Re and Mo-50% Re alloys. For this purpose, stoichiometric mixtures of the component powder metals with particle sizes of 1 to 5 μm average, were first homogenized in a planetary mill and then compacted at 300, 400, 500 and 600 MPa, to the shape of tablets and small billets for rolling to thin foils. The obtained pieces were subjected to sintering at various temperatures in the range of 1400 to 1700°C, under argon-hydrogen protecting atmosphere. The solid solution of rhenium in the molybdenum matrix was followed by means of x-ray diffraction. It was found that at all sintering temperatures rhenium was totally dissolved in theMo-25% Re alloy, while small amounts of an intermediate phase were detected in the case of the Mo-50% Re alloy, in good agreement with the corresponding phase diagram. The densification of sintered parts increased with temperature and compaction pressure up to values less than 9...