Mg的吸放氢条件苛刻、动力学性能差,只有对它进行合金化,才能得到贮氢性能优异的Mg合金。本研究尝试用Cr-Mn元素对Mg进行合金化,用不同工艺方法制备Mg-Cr-Mn合金,并用X射线衍射、扫描电子显微镜和能谱仪对合金进行了物相、形貌和成分表...Mg的吸放氢条件苛刻、动力学性能差,只有对它进行合金化,才能得到贮氢性能优异的Mg合金。本研究尝试用Cr-Mn元素对Mg进行合金化,用不同工艺方法制备Mg-Cr-Mn合金,并用X射线衍射、扫描电子显微镜和能谱仪对合金进行了物相、形貌和成分表征,利用Sieverts加氢装置对部分合金进行充氢试验。研究结果表明:Mg-Cr-Mn没有形成Laves相,Mg只是少量地固溶在Cr Mn合金立方相中。Mg-Cr-Mn合金在107 k Pa、240℃下可少量吸氢。展开更多
Although casting is commonly used to process aluminum alloys, powder metallurgy remains a promising technique to develop aluminum based materials for structural and functional applications. The possibility to synthesi...Although casting is commonly used to process aluminum alloys, powder metallurgy remains a promising technique to develop aluminum based materials for structural and functional applications. The possibility to synthesize Al-Mg-Zr alloys through mechanical alloying and spark plasma sintering techniques was explored. Al-10Mg-5Zr and Al-5Mg-1Zr alloyed powders were synthesized through wet ball milling the appropriate amount of elemental powders. The dried milled powders were spark plasma sintered through passing constant pulsed electric current with fixed pulse duration at a pressure of 35 MPa. The samples were vacuum sintered at 450, 500, 550, 600 and 620 ℃ for 10, 15 and 20 min. The Al-10Mg-5Zr alloy displays poor densification at lower sintering temperatures of 450, 500, 550 and 600 ℃. Its sinterability is improved at a temperature of 620 ℃ whereas sintering temperatures higher than 620 ℃ leads to partial melting of the alloy. It is possible to sinter the Al-5Mg-1Zr alloy at 450, 500 and 550 ℃. The increase of sintering temperature improves its densification and increases its hardness. The Al-5Mg-IZr alloy displays better densification and hardness compared to Al-10Mg-5Zr alloys.展开更多
文摘Mg的吸放氢条件苛刻、动力学性能差,只有对它进行合金化,才能得到贮氢性能优异的Mg合金。本研究尝试用Cr-Mn元素对Mg进行合金化,用不同工艺方法制备Mg-Cr-Mn合金,并用X射线衍射、扫描电子显微镜和能谱仪对合金进行了物相、形貌和成分表征,利用Sieverts加氢装置对部分合金进行充氢试验。研究结果表明:Mg-Cr-Mn没有形成Laves相,Mg只是少量地固溶在Cr Mn合金立方相中。Mg-Cr-Mn合金在107 k Pa、240℃下可少量吸氢。
基金Project(ARP-28-122) supported by King Abdul Aziz City for Science and Technology (KAC ST) of Kingdom of Saudi Arabia
文摘Although casting is commonly used to process aluminum alloys, powder metallurgy remains a promising technique to develop aluminum based materials for structural and functional applications. The possibility to synthesize Al-Mg-Zr alloys through mechanical alloying and spark plasma sintering techniques was explored. Al-10Mg-5Zr and Al-5Mg-1Zr alloyed powders were synthesized through wet ball milling the appropriate amount of elemental powders. The dried milled powders were spark plasma sintered through passing constant pulsed electric current with fixed pulse duration at a pressure of 35 MPa. The samples were vacuum sintered at 450, 500, 550, 600 and 620 ℃ for 10, 15 and 20 min. The Al-10Mg-5Zr alloy displays poor densification at lower sintering temperatures of 450, 500, 550 and 600 ℃. Its sinterability is improved at a temperature of 620 ℃ whereas sintering temperatures higher than 620 ℃ leads to partial melting of the alloy. It is possible to sinter the Al-5Mg-1Zr alloy at 450, 500 and 550 ℃. The increase of sintering temperature improves its densification and increases its hardness. The Al-5Mg-IZr alloy displays better densification and hardness compared to Al-10Mg-5Zr alloys.
