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ASTM F2004-2017 用热分析法测定镍钛合金转变温度的试验方法 Standard Test Method for Transformation Temperature of Nickel-Titanium Alloys by Thermal Analysis
1.1 This test method defines procedures for determining the transformation temperatures of nickel-titanium shape memory alloys, produced in accordance with Specification F2063, by differential scanning calorimetry. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and to determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee....
2023-06-13 09:24:01浏览:88
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用热分析技术研究煤的热解特性
用热分析技术研究了自洗蒙古煤和乌煤在氮气中的热解特性,探讨了升温速率和煤样粒径对热解过程的影响,根据煤热解产物释放特性指数r的大小来确定两种煤的热解性能.结果表明:同一升温速率下,自洗蒙古煤的热解特性要好于乌煤;同一种煤,升温速率越高,r值越大,热解特性越好.应用不同升温速率下的热解曲线计算出两种煤热解过程的动力学参数.用等转化率法求得热解过程的活化能;用主曲线法确定失重过程的最可几机理函数....
2020-06-12 14:57:43浏览:1406
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基于正交实验对宁东煤热解条件的研究
采用正交实验设计方法和热分析法,用热分析仪研究了宁东三种煤样在不同升湿速率和加热终温条件下的热解失重情况,综合评定了宁东煤热解过程中的失重率.通过方差分析表明:加热终温和煤种是影响煤热解时失重率的主要因素,加热速率对失重率影响不明显.实验结果对于进一步研究煤热解过程中产物的产率、产物分布及高附加值化学产品的获得具有指导作用....
2020-06-12 14:56:19浏览:1421
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用热分析技术研究煤的热解特性
用热分析技术研究了自洗蒙古煤和乌煤在氮气中的热解特性,探讨了升温速率和煤样粒径对热解过程的影响,根据煤热解产物释放特性指数r的大小来确定两种煤的热解性能.结果表明:同一升温速率下,自洗蒙古煤的热解特性要好于乌煤;同一种煤,升温速率越高,r值越大,热解特性越好.应用不同升温速率下的热解曲线计算出两种煤热解过程的动力学参数.用等转化率法求得热解过程的活化能;用主曲线法确定失重过程的最可几机理函数....
2020-03-24 09:17:25浏览:1423
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基于正交实验对宁东煤热解条件的研究
采用正交实验设计方法和热分析法,用热分析仪研究了宁东三种煤样在不同升湿速率和加热终温条件下的热解失重情况,综合评定了宁东煤热解过程中的失重率.通过方差分析表明:加热终温和煤种是影响煤热解时失重率的主要因素,加热速率对失重率影响不明显.实验结果对于进一步研究煤热解过程中产物的产率、产物分布及高附加值化学产品的获得具有指导作用....
2020-03-24 09:11:03浏览:1420
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