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高钛渣还原的氢化钛合金粉一步烧结制备高强钛合金 被引量:1
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作者 董朝望 夏阳 +4 位作者 郭学益 田庆华 刘汉宁 刘沛东 陈渝冰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第11期3801-3809,共9页
提出一种直接利用高钛渣制备高强钛合金的方法。先用镁粉还原高钛渣制备氧含量为1.3%(质量分数)的合金粉末,再将合金粉末在600 MPa压力下压制成小圆柱体,最后在氩气下烧结成钛合金产品。对还原粉末进行表征,研究烧结温度对烧结合金的烧... 提出一种直接利用高钛渣制备高强钛合金的方法。先用镁粉还原高钛渣制备氧含量为1.3%(质量分数)的合金粉末,再将合金粉末在600 MPa压力下压制成小圆柱体,最后在氩气下烧结成钛合金产品。对还原粉末进行表征,研究烧结温度对烧结合金的烧后密度、抗压强度、显微组织和硬度的影响。结果表明,随着烧结温度由900℃升高至1200℃,钛合金的密度增加,孔隙率降低,实现较好的烧结致密化(1100℃为98.65%,1200℃为99.41%),在1100℃时硬度达到HV 655.7,压缩强度为1563 MPa。 展开更多
关键词 高钛渣 还原 钛合金 烧结
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氧化物直接还原制备低氧Ti-48Al-2Cr-2Nb合金粉末 被引量:3
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作者 郭学益 董朝望 +3 位作者 夏阳 刘沛东 刘汉宁 田庆华 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第4期1351-1361,共11页
以TiO_(2)、Al_(2)O_(3)、Nb_(2)O_(5)和Cr_(2)O_(3)粉末混合物为原料,通过镁还原和钙脱氧,成功制备出氧含量低至0.0572%、粒径<150μm的高纯度Ti-48Al-2Nb-2Cr合金粉末。详细分析了每一步产物的物相组成及元素分布。结果表明,最终... 以TiO_(2)、Al_(2)O_(3)、Nb_(2)O_(5)和Cr_(2)O_(3)粉末混合物为原料,通过镁还原和钙脱氧,成功制备出氧含量低至0.0572%、粒径<150μm的高纯度Ti-48Al-2Nb-2Cr合金粉末。详细分析了每一步产物的物相组成及元素分布。结果表明,最终粉末产品的物相为γ-Ti Al和少量α_(2)-Ti_(3)Al相,Ti、Al、Cr、Nb的原子比为49.73:43.51:2.05:1.98,Ti、Al、Cr、Nb均匀分布于粉末产品中。借助HSC化学热力学软件及Pandat软件下的Ti合金数据库,模拟研究了还原和脱氧机理。 展开更多
关键词 钛铝 粉末 还原 氧化物
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Quality Measurement and Improvement Study of Surgical Coronary Revascularization: Medication Adherence (MISSION-2)
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作者 Chong-Yang liu Jun-Zhe Du +11 位作者 Chen-Fei Rao Heng Zhang han-ning liu Yan Zhao Li-Meng Yang Xi Li Jing Li Jue Wang Hui-Shan Wang Zhi-Gang liu Zhao-Yun Cheng Zhe Zheng 《Chinese Medical Journal》 SCIE CAS CSCD 2018年第12期1480-1489,共10页
Background: Secondary preventive therapies play a key role in the prevention of adverse outcomes after coronary artery bypass grafting (CABG). However, medication adherence alter CABG is often poor, and conventiona... Background: Secondary preventive therapies play a key role in the prevention of adverse outcomes after coronary artery bypass grafting (CABG). However, medication adherence alter CABG is often poor, and conventional interventions for improving adherence have limited success. With increasing penetration of smartphones, health-related smartphone applications might provide an opportunity to improve adherence. Carefully designed trials are needed to provide reliable evidence for the use of these applications in patients after CABG. Methods: The Measurement and Improvement Studies of Surgical Coronary Revascularization: Medication Adherence (MISSION-2) study is a multicenter randomized controlled trial, aiming to randomize 1000 CABG patients to the intervention or control groups in a 1 : 1 ratio. We developed the multifaceted, patient-centered, smartphone-based Heart Health Application to encourage lnedication adherence in the intervention group through a health self management program initiated dnring hospital admission for CABG. The application integrated daily scheduled reminders to take the discharge medications, cardiac edticational materials, a dynamic dashboard to review cardiovascular risk factors and secondary prevention targets, and weekly questionnaires with interactive feedback. The primary outcome was secondary preventive medication adherence measured by the Chinese version of the 8-item Morisky Medication Adherence Scale at 6 months after randomization. Secondary outcomes included all-cause death, cardiovascular rehospitalization, and a composite of death, myocardial infarction, stroke, and repeat revascularization.Discussion: Findings will not only provide evidence regarding the feasibility and effectiveness of the described intervention for improving adherence to CABG secondary preventive therapies but also explore a model tor outpatient health self-managenlent that could be translated to various chronic diseases and widely disseminated across resource-limited settings. 展开更多
关键词 Coronary Artery Bypass Grafting MedicationAdherence Mobile Applications Mobile Health Secondary Prevention
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