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thermal evaluation of the injectable liquid metal bone cement in orthopedic treatment

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Science China(Technological Sciences) 2020年第3期63卷 446-458页

作者： ZHANG QingLei YAO YuChen GAO JianYe YANG XiaoHu ZHANG PengJu DENG ZhongShan LIU Jing Beijing Key Laboratory of Cryo-Biomedical Engineering Technical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190China CAS Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of Sciences Beijing 100190China School of Engineering University of Chinese Academy of Sciences Beijing 100049China School of Future Technology University of Chinese Academy of Sciences Beijing 100049China Department of Biomedical Engineering School of MedicineTsinghua University Beijing 100084China

The thermophysical properties of bone cement are important parameters for its application in the orthopedic treatment. This article focused on the thermal evaluation of the low-melting-point metal(Bi In Sn alloy), which has been proved to be an excellent bone cement. Firstly, the basic thermophysical properties of Bi In Sn alloys with different melting points were ***, 15 fresh porcine femurs placed in the saline bath, bone cements with different melting points and amounts were injected into the bone cavities, respectively. Thermocouples were used to measure the temperature changes of the bone-cement interface and peripheral bone tissue. The possibility of thermal necrosis was evaluated. Moreover, a three-dimensional human knee model was built to numerically assess the effects of thermal parameters, such as melting point and latent heat on tissue temperature distribution. All the experimental and numerical results implied the heat distribution in the tissue depended on the thermal performances of liquid metal bone cement(LMBC). For LMBC of the same melting point, with increased amounts, the damage to the bone tissue is more severe, while for the same amount of different melting point LMBCs, with the higher melting point, which will lead to more serious damage to the tissue. Also, higher latent heat of LMBC has distinct longer solidification process, which may cause irreversible damage to surrounding tissues. Therefore, in the future, for different clinical surgery needs, the appropriate liquid metal bone cement can be obtained by adjusting the thermal parameters.

关键词： liquid metal bone cement thermal evaluation phase transition orthopedic treatment numerical simulation thermal parameters

Crystallization Behaviour and Mechanical Properties of Zr_(65)Cu_(18)Ni_9Al_8 Bulk Metallic Glass

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Journal of Materials Science & Technology 2007年第5期23卷 693-696页

作者： M.Iqbal J.I.Akhter Haifeng ZHANG Zhuangqi HU Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences 72 Wenhua Road Shenyang 110016 China Physics Division Pakistan Institute of Nuclear Science and Technology P.O. Nilore Islamabad Pakistan

Designing and synthesis of cost effective bulk metallic glasses （BMGs） has been of considerable interest during the last decade so that they can be made commercially viable. Among these, Zr-based BMGs have been reported extensively due to their attractive properties, An alloy having composition Zr65Cu18Ni9A18 was designed and synthesized using 2-3 N pure materials by Cu mould casting. The alloy was characterized by X- ray diffraction （XRD）, scanning electron microscopy （SEM）, energy dispersive X-ray spectroscopy （EDS） and high temperature differential scanning calorimetry （DSC）. thermal parameters like supercooled liquid region △Tx, reduced glass transition temperature Trg, γ and δ parameters were evaluated. Mechanical properties like microhardness, nanohardness, elastic modulus and fracture strength were measured. The alloy showed wide supercooled liquid region of 129＋1 K with improved thermal stability. The alloy has considerable fracture strength along with fair amount of ductility.

关键词： Zr-based bulk amorphous alloys Mechanical properties Glass-forming ability thermal parameters

Helicity as a Method for Forecasting Severe Weather Events

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Advances in Atmospheric Sciences 1996年第4期13卷 533-538页

作者：丁金才戴建华陈亚敏胡富泉唐新章 Shanghai Meteorological Center Shanghai 200030 Shanghai Meteorological Bureau Shanghai 200030

This paper introduces a method for forecasting severe weather which is yieded by integrating helicity as a dynamical parameter with K and TOT indexes as thermal *** results of operational tests for two years ure *** t... 详细信息

关键词： Helicity thermal parameters Application suitability

Tetrahydro-dibenzo[a,d]Annulene-5,11-Dihydrazone and Magnesium Oxide Used to Control the Corrosion of Aluminium in Chloride Ions Environment

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Journal of Metallic Material Research 2020年第2期3卷 47-53页

作者： Rajesh Kumar Singh Jay Prakash Singh Dharmendar Kumar Department of Chemistry Jagdam CollegeJ P UniversityChapra841301India

Chloride ions interact with aluminium in marine atmosphere to form corrosion *** to this corrosion reaction occurs on their surface,aluminium is oxidized into Al3+.The corrosion reaction accelerates deterioration in metal and it produces galvanic,pitting,stress,crevice,intergranular *** ions decrease internal and external strength of aluminium *** is a very important metal so used in different appliances for ***,water,air transports,housing,railways and other *** and electrospray techniques used to check the corrosion of aluminium *** nanocoating and electrospray materials applied tetrahydro-dibenzo[a,d][7]annulene-5,11-dihydrazone and *** materials formed composite barrier and developed a passive surface for *** barrier reduced the corrosion rate of *** spray and chemical vapour deposition technique used for coating *** corrosion rate of metal was determined by gravimetric *** potential and current density were calculated by *** composite barrier formation was confirmed by activation energy,heat of adsorption,free energy,enthalpy and *** thermal parameters were obtained by Arrhenius equation,Langmuir isotherm and Transition state *** adsorption of tetrahydro-dibenzo[a,d][7]annulene-5,11-dihydrazone and MgO electrospray on aluminium surface was depicted by Langmuir,Frundlich and Temkin *** results of surface coverage area and coating efficiency were noticed that both materials were mitigated the corrosion rate of aluminium in chloride ions environment.

关键词： Chloride ions Aluminium Corrosion Electrospray thermal parameters Marine environment

Selection of Mixed Refrigerant for CBM Liquefaction System and its Optimization Analysis

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Selection of Mixed Refrigerant for CBM Liquefaction System a...