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钛合金高温比热测量方案
2020/08/18 17:22
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方案摘要：
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高温型差示扫描量热仪 DSC 404 F1 Pegasus®
型号： DSC 404 F1 Pegasus®
产地： 德国
品牌： 耐驰
¥50万 - 100万
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高压型差示扫描量热仪
型号： DSC 204 HP
产地： 德国
品牌： 耐驰
¥50万 - 100万
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方案详情：
钛合金高温比热测量 朱明峰，曾智强 钛合金是由钛和其他金属元素混合所形成的一类金属材料，在高温下具有较高的拉伸强度和韧性，而且质轻、抗腐蚀和耐高温性能非常优异。然而，较高的原材料和加工成本使得它仅限用于军事、飞机、航空、医疗、高端运动器材和消费电子产品。添加超过10wt%的铬可以提高钛合金的抗灼烧性能，当铬含量超过15%时，可以使得它在航空发动机环境下抵抗510°C的高温。某些合金经过快速冷却后可以形成部分无定形结构。 测试条件： 温度范围：RT…1525°C 样品质量：83.06 mg 升温速率：20K/min 坩埚：Pt加内衬 气氛：Ar，50ml/min 传感器：DSC，S型 测试结论： 上图是钛-铬合金从室温到1525°C下的表观比热曲线。在723°C，比热曲线上叠加了无定形部分的冷结晶峰，在1211°C出现宽广的吸热峰，这是α→β相转变过程。合金的熔融发生在1400°C，热焓为282.3J/g。即使在熔融液相区，也没有发现由于氧化造成的比热曲线下降趋势，而这一切必须是在极其纯净的气氛和特殊的坩埚组合（带氧化钇涂层）下才能得以实现。
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