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An effective strategy towards construction of CVD SiC fiber-reinforced superalloy matrix composite

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Journal of Materials Science & Technology 2020年第14期47卷 179-185页

作者： haoqiang zhang Lin Liu Zhiliang Pei Nanlin Shi Jun Gong Chao Sun Institute of Metal Research Chinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

In this work,a modified approach for preparing CVD SiC fiber-reinforced superalloy matrix composites was rationally *** composites were fabricated by vacuum hot pressing(VHP)process using precursor wires coated with(Al+Al2O3)diffusion barrier layers and GH4169 superalloy ***-7 brazing filler metals were introduced on the surface of precursor wires in order to decrease the temperature of the VHP *** was found that the VHP temperature was reduced by about 100℃,and the melting,diffusion,nucleation and growth processes of BNi-7 fillers at 900?C motivated the recrystallization and plastic flow of the matrix under the increasing pressure,thereby a compact composite composed of intact SiC fibers and fine equiaxial grain structure superalloy matrix was ***,the elements were distributed homogeneously among the fibers in the composite and no interfacial reactions *** method provides a new insight for designing and manufacturing high-quality composites in practical engineering.

关键词： SiC fiber Superalloy Diffusion barrier Brazing filler metal

Measurement of interfacial residual stress in SiC fiber reinforced Ni-Cr-Al alloy composites by Raman spectroscopy

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Journal of Materials Science & Technology 2019年第1期35卷 88-93页

作者： Xixi Niu haoqiang zhang Zhiliang Pei Nanlin Shi Chao Sun Jun Gong Institute of Metal Research Chinese Academy of Sciences University of Chinese Academy of Sciences School of Materials Science and Engineering University of Science Technology of China

Raman spectroscopy was used to measure Raman spectra of the inner SiC fibers and surface C-rich layers of SiC fibers, composite precursors and SiCf/Ni-Cr-Al composites. The residual stresses of the inner SiC fibers and surface C-rich layers were calculated, and the effect of the(Al + Al_2O_3) diffusion barrier layer on the interfacial residual stress in the composites was analyzed in combination with the interface microstructure and energy disperse spectroscopy(EDS) elements lining maps. The results show that the existence of(Al + Al_2O_3) diffusion barrier improves the compatibility of the SiCf/Ni-Cr-Al interface,inhibits the adverse interfacial reaction, and relieves the residual stress inside SiC fibers and at the interface of composite material. Heat treatment can reduce the residual stress at the interface. As the heat treatment time increases, the residual stress at the interface decreases.

关键词： Ni-Cr-Al alloy SiC fiber Composite Raman spectra Diffusion barrier coating Residual stress

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超高层建筑结构竖向地震响应的谱单元分析

哈尔滨工业大学学报 2014年第8期46卷 72-77页

作者：何政张昊强大连理工大学土木工程学院辽宁大连116024

为研究脉冲型强震中的竖向分量对超高层建筑结构动力响应的影响,针对常见的框架——核心筒体系,应用谱单元分析其简化的主结构体系模型在脉冲型强震竖向分量作用下的波动效应,并与基于振动力学的动力时程分析结果进行比较.为反映结构体... 详细信息

为研究脉冲型强震中的竖向分量对超高层建筑结构动力响应的影响,针对常见的框架——核心筒体系,应用谱单元分析其简化的主结构体系模型在脉冲型强震竖向分量作用下的波动效应,并与基于振动力学的动力时程分析结果进行比较.为反映结构体系中巨型水平联系构件中剪切变形的影响,推导了考虑剪切变形的Timoshenko梁谱单元,竖向构件的轴向反应则用谱单元中的杆单元来模拟,在分析中通过对波动方程的修正来反映地震波传播的时延性.算例分析结果表明:在脉冲型强震竖向分量作用下,竖向构件的轴力波动较为明显,内部核心筒与外部巨型柱的相对错动效应显著,横向构件剪切问题不容忽视,此类损伤与后继水平地震分量作用的非线性耦合效应更须注意.

关键词：超高层建筑脉冲型激励竖向地震谱单元方法波动效应剪切变形 Timoshenko梁

Noninvasive diagnosis of chronic kidney disease based on urinary extracellular vesicle proteomic profiling

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Noninvasive diagnosis of chronic kidney disease based on uri...

Reconstructing avascular necrotic femoral head through a bioactiveβ-TCP system:From design to application

第三届全国系统生物学大会

作者： zhang haoqiang Zeng Rong

Chronic kidney disease(CKD) typically manifests as either structural renal damage or a significant reduction in glomerular filtration rate(GFR),and its global prevalence is on the *** types of renal diseases may present similar symptoms,yet their etiology and pathological features could differ,necessitating tailored therapeutic ***,renal biopsy,an invasive procedure,brings considerable discomfort to patients and entails the risk of various *** have been exploring non-invasive diagnostic methods to replace or complement renal biopsy and provide improved guidance for CKD diagnosis and *** vesicles(EVs) are a class of small membranous vesicles secreted and released by cells into the extracellular *** diameters typically ranging from 30 to 150 nm,EVs carry various biomolecules including proteins,nucleic acids,lipids,and small molecule *** are implicated in intercellular signaling,immune regulation,tumor growth and metastasis,as well as neuronal *** to their wide and stable presence in bodily fluids,EVs are relatively minimally invasive or non-invasive to obtain compared to traditional traumatic tissue *** are considered potential biomarkers for disease diagnosis approaching non-invasiveness,making them a prime choice for liquid *** this context,we explore a hypothesis that the analysis of urinary EV proteomes can differentiate between different types of CKD,regardless of the underlying disease *** employed urinary EV proteomic data from 384 CKD patient samples,utilizing anion exchange chromatography for EV separation and tandem mass spectrometry for proteomic profiling.A discovery cohort of 210 samples was established,with an independent validation set of 174 *** distinct types of chronic kidney diseases,several potential urinary EV biomarker proteins were defined and integrated into Support Vector Machine(SVM)-based classifiers sp

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Bioactive Materials 2023年第10期28卷 495-510页

作者： Yajie Lu Xiantao Chen Xiao Lu Changning Sun Minghui Li Guojing Chen Zuoyao Long Yuan Gao haoqiang zhang Mengquan Huang Chuanlei Ji Hongbin Fan Dong Liu Yuewen Hao Hong Wang Leilei zhang Hongmei zhang Jianxi Lu Zhen Wang Jing Li Department of Orthopedics Xijing HospitalAir Force Medical UniversityXi’an710032China Department of Clinical Oncology Xijing HospitalAir Force Medical UniversityXi’an710032China The State Key Laboratory of Cancer Biology Biotechnology Center School of PharmacyAir Force Medical UniversityXi’an710032China Department of Osteonecrosis of the Femoral Head Luoyang Orthopedic-Traumatological Hospital of Henan ProvinceLuoyang471002China Shanghai Bio-lu Biomaterials Co. LtdShanghai201100China Shanghai Technology Innovation Center of Orthopedic Biomaterials Shanghai201100China State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong UniversityXi’an710054China National Medical Products Administration(NMPA)Key Laboratory for Research and Evaluation of Additive Manufacturing Medical Devices School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an710054China Department of Orthopedics General Hospital of Northern Theater CommandShenyang110000China Department of Orthopedics The 940th Hospital of Joint Logistics Support Force of People’s Liberation ArmyLanzhou730000China Department of Medical Imaging Xi’an Children’s HospitalXi’an710000China Department of Medical Imaging Xijing HospitalAir Force Medical UniversityXi’an710032China

A variety of techniques have been used for treating avascular necrosis of the femoral head(ANFH),but have frequently *** this study,we proposed aβ-TCP system for the treatment of ANFH by boosting revascularization and bone *** angio-conductive properties and concurrent osteogenesis of the highly interconnected porousβ-TCP scaffold were revealed and quantified through an in vivo model that simulated the ischemic environment of *** test and finite element analysis showed that the mechanical loss caused by tissue necrosis and surgery was immediately partially compensated after implantation,and the strength of the operated femoral head was adaptively increased and eventually returned to normal bone,along with continuous material degradation and bone *** translational application,we further conducted a multi-center open-label clinical trial to assess the efficacy of theβ-TCP system in treating *** hundred fourteen patients with 246 hips were enrolled for evaluation,and 82.1%of the operated hips survived at a 42.79-month median *** imaging results,hip function,and pain scores were dramatically improved compared to preoperative *** stage II disease outperformed stage III in terms of clinical ***,bio-adaptive reconstruction using theβ-TCP system is a promising hip-preserving strategy for the treatment of ANFH.

关键词： Avascular necrosis of the femoral head β-TCP Vascularization Bone regeneration Clinical trial Bioadaptability

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活性焦制备过程中汞的迁移研究

洁净煤技术 2019年第5期25卷 125-130页

作者：张浩强煤基节能环保炭材料北京市重点实验室煤炭资源高效开采与洁净利用国家重点实验室国家能源煤炭高效利用与节能减排技术装备重点实验室

为研究工业活性焦生产过程中汞的迁移情况,使用实验室设备模拟工业制备活性焦的工艺过程制备活性焦样品,并以冷原子吸收法为基本原理的测汞仪对制备活性焦的原料煤、炭化样品和活性焦样品的汞含量进行测定,计算制备过程中汞的迁移量。... 详细信息

为研究工业活性焦生产过程中汞的迁移情况,使用实验室设备模拟工业制备活性焦的工艺过程制备活性焦样品,并以冷原子吸收法为基本原理的测汞仪对制备活性焦的原料煤、炭化样品和活性焦样品的汞含量进行测定,计算制备过程中汞的迁移量。结果表明:制备活性焦的原料煤中汞含量为42.4 ng/g,制备过程的中间产物炭化样品(TH)的汞含量仅为1.0 ng/g,活性焦样品(HXJ)的汞含量仅为0.8 ng/g。原料煤中汞的赋存形态主要以共价化合物的无机盐和一些腐植酸中的有机汞存在,这些汞化合物的分解温度在350℃左右,而炭化温度可达到650℃,此时原料煤中大部分汞的化合物都已分解并以零价汞蒸汽的形式逸散到大气中。炭化过程是活性焦制备过程中汞迁移逸散量最大的阶段,原料中97.6%的汞在此阶段逸散到空气中。在工业化制备活性焦过程中,对炭化阶段产生的尾气进行脱汞处理十分必要。

关键词：活性焦汞迁移汞含量冷原子吸收法

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串联式密炼机卸料门液压驱动系统设计与仿真

机床与液压 2018年第20期46卷 109-112页

作者：张浩强河池学院物理与机电工程学院广西宜州546300

设计密炼机卸料门液压驱动系统,利用AMESim建立系统仿真模型并进行动态性能仿真,分析蓄能器充气压力和容积对密炼机卸料门开启时间的影响规律。仿真可得:所设计的液压驱动系统能在极短的时间内开启密炼机卸料门;蓄能器气囊压力增大或蓄... 详细信息

设计密炼机卸料门液压驱动系统,利用AMESim建立系统仿真模型并进行动态性能仿真,分析蓄能器充气压力和容积对密炼机卸料门开启时间的影响规律。仿真可得:所设计的液压驱动系统能在极短的时间内开启密炼机卸料门;蓄能器气囊压力增大或蓄能器气囊容积增大,密炼机卸料门开启时间均减小。

关键词：串联式密炼机卸料门液压驱动系统 AMESim仿真开启时间

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4-RRR冗余并联机构的动力学分析

机床与液压 2017年第17期45卷 87-90页

作者：张浩强河池学院物理与机电工程学院广西宜州546300

为了分析冗余4-RRR并联机构在高速、高载荷下的的动力学特性和运动精度,利用坐标变换矩阵求解冗余4-RRR平面并联机构反解方程,推导机构雅克比矩阵。在此基础上,将并联机构分解为动平台和一、二连杆子系统,采用Lagrange法建立子系统动力... 详细信息

为了分析冗余4-RRR并联机构在高速、高载荷下的的动力学特性和运动精度,利用坐标变换矩阵求解冗余4-RRR平面并联机构反解方程,推导机构雅克比矩阵。在此基础上,将并联机构分解为动平台和一、二连杆子系统,采用Lagrange法建立子系统动力学模型,然后推导出机构整体动力学模型。以Matalb/Simulink为工具,对该机构的动力学进行算例仿真,仿真结果表明:4-RRR平面并联机构各驱动构件在实现期望轨迹的运动过程中,驱动力和力矩的变化、数值大小各不相同,但均呈正余弦曲线规律变化。所提出的研究方法快速有效,为机构后续研究提供了理论依据。

关键词：雅克比矩阵 4-RRR 冗余并联机构动力学

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4-RRR冗余并联机构的运动学分析

机床与液压 2017年第7期45卷 154-157页

作者：张浩强河池学院物理与机电工程学院广西宜州546300

针对4-RRR冗余并联机构的输入及输出构件间的位置关系展开研究。基于运动螺旋理论,分析了该机构的自由度性质,并确定了主动副的位置;建立了机构的逆运动学方程及正运动学方程,并对给定运动平台的位姿进行了数值计算,以验证所建立方程的... 详细信息

针对4-RRR冗余并联机构的输入及输出构件间的位置关系展开研究。基于运动螺旋理论,分析了该机构的自由度性质,并确定了主动副的位置;建立了机构的逆运动学方程及正运动学方程,并对给定运动平台的位姿进行了数值计算,以验证所建立方程的正确性;研究了机构的运动解耦性以及运动平台的工作空间大小与连杆长度变化的关系;最后,对给定运动平台的运动方程下主动副的输出转角进行了数值仿真。

关键词： 3-RPRS 并联机构螺旋理论 6自由度动力学