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通过热力学平衡相计算方法,系统研究了某新型镍基粉末高温合金时效温度下合金元素对热力学平衡相析出行为的影响.计算结果表明:René 104合金析出的主要平衡相为γ'、MC、M23C6、M3B2和TCP相.Cr和Co含量主要影响TCP相的析出行为及γ'相的析出温度,Cr含量对M23C6和M3B2的析出行为有一定的影响,Cr的建议质量分数为13%;Mo和W含量影响TCP相和M3B2的析出行为.质量比Al/Ti和Nb/Ta影响γ'相的析出行为,建议控制Al/Ti和Nb/Ta比平衡,以使γ'相起到理想的强化效果.C和B含量显著影响碳化物和硼化物的析出量,还可间接抑制TCP相析出;Zr含量对MC和M23C6碳化物的析出有影响;增Co降Cr和调节合金元素含量以获得小的点阵错配度是第3代涡轮盘用粉末冶金高温合金成分优化设计的趋势
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La Convention européenne des droits de l’homme
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《有机化学》课程教学资源(文献资料)When did Louis Pasteur present his memoir on the discovery of molecular chirality to the Académie des sciences Analysis of a discrepancy
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机器学习:具有Lévy飞行特征的蝙蝠算法
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又称吉兰-巴雷综合征(Guillain-Barré Syndrome,GBS ),是以周围神经和神经根的脱髓鞘、小血管周围淋巴细胞及巨噬细胞的炎性反应为病理特点的自身免疫性疾病
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复旦大学:《英美短篇小说 British and American Short Stories》学生课堂报告_Madame Célestin's Divorce
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1. Overview 1. World café market 2. History 3. What is Starbucks 4. Company’s figure 5. Business model 6. Marketing strategy 3 Starbacks 2. Analysis 1. SWOT 2. Chinese market 3. Starbucks in China 4. Competitors 5. Obstacles 6. Future plan
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复旦大学:《英美短篇小说 British and American Short Stories》学生评注及赏析_Madame Célestin's Divorce
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Describing the fundamental physical properties of materials used in electronics, the thorough coverage of this book will facilitate an understanding of the technological processes used in the fabrication of electronic and photonic devices. The book opens with an introduction to the basic applied physics of simple electronic states and energy levels. Silicon and copper, the building blocks for many electronic devices, are used as examples. Next, more advanced theories are developed to better account for the electronic and optical behavior of ordered materials, such as diamond, and disordered materials, such as amorphous silicon. Finally, the principal quasi-particles (phonons, polarons, excitons, plasmons, and polaritons) that are fundamental to explaining phenomena such as component aging (phonons) and optical performance in terms of yield (excitons) or communication speed (polarons) are discussed
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《数值分析》课程PPT教学课件(英文版)Chapter 01 The Solution of Nonlinear Equations 1.6 Padé Approximation
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