摘要：At present,the clinical reconstruction of the auricle usually adopts the strategy of taking autologous costal *** method has great trauma to patients,poor plasticity and inaccurate ***-dimensional(3D)printing technology has made a great breakthrough in the clinical application of orthopedic *** study explored the combination of 3D printing and tissue engineering to precisely reconstruct the ***,a polylactic acid(PLA)polymer scaffold with a precisely customized patient appearance was fabricated,and then auricle cartilage fragments were loaded into the 3D-printed porous PLA scaffold to promote auricle *** vitro,gelatin methacrylamide(GelMA)hydrogels loaded with different sizes of rabbit ear cartilage fragments were studied to assess the regenerative activity of various autologous cartilage *** vivo,rat ear cartilage fragments were placed in an accurately designed porous PLA polymer ear scaffold to promote auricle *** results indicated that the chondrocytes in the cartilage fragments could maintain the morphological phenotype in *** three months of implantation observation,it was conducive to promoting the subsequent regeneration of cartilage in *** autologous cartilage fragments combined with 3D printing technology show promising potential in auricle reconstruction.

摘要：The bone regenerative scaffold with the tailored degradation rate matching with the growth rate of the new bone is essential for adolescent bone *** satisfy these requirement,we proposed bone tissue scaffolds with controlled degradation rate using osteoinductive materials(Ca-P bioceramics),which is expected to present a controllable biodegradation rate for patients who need bone *** properties,porosity,compressive strength and degradation properties of the scaffolds were studied.3D printed Ca-P scaffold(3DS),gas foaming Ca-P scaffold(FS)and autogenous bone(AB)were used in vivo for personalized beagle skull defect *** results indicated that the 3DS was highly vascularized and well combined with surrounding *** showed obvious newly formed bone *** showed the best repair effect,but it was found that AB scaffolds were partially absorbed and *** study indicated that the 3D printed Ca-P bioceramics with tailored biodegradation rate is a promising candidate for personalized skull bone tissue reconstruction.

摘要：目的对纤维环组织工程的材料及应用前景进行综述。方法广泛查阅近年来有关纤维环组织工程的相关文献,对种子细胞、生物活性分子及生物材料的研究进展进行综述。结果 MSCs是种子细胞的理想选择;当纤维环细胞和MSCs联合培养时,两者最佳培养比例为2∶1。生物活性分子可分成生长因子、形态因子、酶抑制剂和细胞内调节剂四种类型,它们在促进纤维环细胞外基质分泌、维持椎间盘内环境稳态及代谢平衡方面发挥积极作用。生物材料依据材料来源分为天然材料、人工合成材料和复合材料;纤维环的力学特性是材料设计的重要依据。当前尚无公认的最合适支架材料,支架材料选择仍需进一步研究;新型复合材料的开发是发展趋势。结论纤维环组织工程在纤维环再生修复研究中具有广阔临床应用前景。

摘要：日本福岛核电站事故的发生,使锆合金作为核燃料包壳材料的安全性受到了质疑,世界各国竞相提出研制事故容错燃料(ATF)。FeCrAl合金凭借其优异的抗高温蒸汽腐蚀性能成为了先进ATF包壳材料研发的重点之一。本文主要从成分设计、制备方法、增强颗粒的选择等方面概述了用于ATF的颗粒增强FeCrAl包壳材料的研究进展,指出了颗粒增强FeCrAl包壳材料存在的问题。

摘要：19世纪末,哈尔滨市道外区形成了以中国民族工商业为主体的商业街区,建造了大量西洋样式与中原装饰相融合的折中主义建筑。今天,多种原因造成了这些历史建筑群和传统建筑装饰不同程度的破损,原有的历史文化景观在逐渐消失。本文选取现存建筑群中最具有代表性的装饰纹样进行实地测绘调查,重新阐述和解读该区域历史建筑的装饰方法,为将来合理地继承、保护及再建设提供必要的参照依据。

摘要：作为一种固态无机电解质材料,石榴石型立方相Li_(7)La_(3)Zr_(2)O_(12)具有较高的室温锂离子电导率、较宽的电化学窗口和优良的热稳定性等特点,是高安全性、高能量密度固态锂离子电池实现商业化应用的关键。阐述了Li_(7)La_(3)Zr_(2)O_(12)的晶体结构与锂传导机理,综述了元素掺杂、聚合物电解质复合、烧结助剂引入、表面包覆或修饰等方式对Li_(7)La_(3)Zr_(2)O_(12)的物相结构稳定性、界面阻抗与相容性、烧结活性、离子电导率等进行改性的最新研究进展。最后,针对Li_(7)La_(3)Zr_(2)O_(12)在产业化应用中所面临的障碍与挑战,提出了制备新工艺的开发、离子电导率的多重改性以及柔性复合电解质膜的结构设计与优化等应对策略,为推动高性能固态锂离子电池的发展提供依据。

摘要：引弧稳定性是制约焊剂带约束电弧焊接方法实现广泛应用的主要因素.为解决引弧不稳定问题,设计了一种焊接控制系统,实现了引弧阶段和焊接阶段独立控制.实验发现:引弧工艺参数是影响引弧稳定性的主要因素,当引弧延时时间为0.8~1.2 s、引弧电流为160~170 A、引弧电压为22~24 V时,能够稳定引弧,电弧不会出现攀升现象,焊缝成形良好.

摘要：采用机械合金化和放电等离子烧结技术制备了Ti28Nb2Zr8Sn合金,研究了烧结温度对合金相对密度、显微组织及力学性能的影响.结果表明:当烧结温度为750℃和850℃时,合金致密度为97.6%和97.8%,合金主要由β相和α″相组成,其压缩屈服强度约为1750 MPa,压缩断裂应变分别为16.81%和19.91%.当烧结温度升至950℃和1050℃时,合金致密度高达99.8%,其中的α″相明显粗化,压缩屈服强度降至1655 MPa和1649 MPa,压缩断裂应变大幅提高至28.16%和30.58%,此时合金具有较佳的综合力学性能.

摘要：FeCoNiCrMn高熵合金是目前性能最出色的单相高熵合金之一,成为了当前领域的研究热点.通过放电等离子烧结将FeCoNiCrMn高熵合金粉末烧结成块,并利用X射线衍射仪、硬度计、万能试验机、电化学工作站以及扫描电子显微镜等设备测试和分析了制备的FeCoNiCrMn高熵合金的晶体结构、力学性能和耐腐蚀性能.力学性能测试结果表明:随着烧结压力从30 MPa增加至50 MPa,合金的延伸率从45.2%提升至48.1%.电化学测试结果表明:在3.5 wt.%NaCl溶液和0.5 mol/L H_(2)SO_(4)溶液中,FeCoNiCrMn高熵合金具有比1Cr18Ni9Ti不锈钢更低的腐蚀电位,更大的腐蚀电流密度,腐蚀类型主要以点蚀为主,在0.5 mol/L H_(2)SO_(4)溶液中高熵合金抵抗高电位腐蚀的能力较强.

摘要：针对现有铁素体钢在反应堆压力容器中抗压强度低与低温脆性高的问题,采用真空电弧熔炼法制备了系列Al_(x)FeNi_(2.5)CrMo高熵合金试样,并利用X射线衍射、扫描电子显微镜、能量散射谱以及力学性能测试等方式分析了Al含量对高熵合金微观结构和力学性能的影响.实验结果表明,制备的Al_(x)FeNi_(2.5)CrMo高熵合金主要由面心立方主相和少量的Laves相组成,其微观组织呈现出典型的树枝晶和枝晶间结构,且枝晶的分布均匀性随着Al含量的增加而变差;其抗压强度和抗拉强度随着Al含量的增加呈现出先增加后降低的趋势,当Al含量x=0.2时,高熵合金的抗压强度和抗拉强度达到最大值,分别为3984 MPa和795 MPa.