The invention discloses a composite stent and a preparation method thereof. The composite stent consists of a silk fibroin three-dimensional micropore stent and hydroxylapatite, wherein the hydroxylapatite is uniformly deposited on the surface of the silk fibroin stent. The preparation method of the composite stent comprises the following steps of (1) preparing the silk fibroin three-dimensional micropore stent; and (2) preparing a fibroin/hydroxylapatite composite stent by a microwave-assisted alternate mineralization method. According to the preparation method disclosed by the invention, a microwave-assisted technique is adopted, so that the mineralization time is shortened, the mineralization efficiency is improved, and a composite stent material excellent in properties is prepared; through the adoption of the preparation method disclosed by the invention, the dosage of mineralizing solutions is also reduced, and the preparation cost is reduced; besides, through the adoption of thepreparation method disclosed by the invention, harmful organic solvents are not used, so that environment pollution is prevented from appearing; and moreover, the preparation method is simple to operate, and large-scale industrial production is facilitated.

Composite stent and preparation method thereof

The invention discloses a silicon carbide whisker-aluminum oxide sub-micron particle multiscale modified ZrC-SiC multiphase ceramic powder preparation method which comprises the steps: evenly mixing acarbon source solution, silica sol, zirconium oxychloride octahydrate and aluminum sulfate; further utilizing a mineralizing agent to regulate to achieve conversion from sol to gel; putting the gel under the low temperature environment to be dried to achieve porosity; carbonizing under 800 to 1,000 DEG C after being dried; finally, performing thermal treatment under 1,400 DEG C to 1,600 DEG C. The preparation method disclosed by the invention has the advantages of simple technologies, short preparation period, low cost and the like; furthermore, the method has the advantages of high product yield, obvious structure and the like. The prepared SiCNW-SiC-ZrC-Al2O3 multiphase ceramic powder prepared by the preparation method disclosed by the invention is favorable for achieving a full temperature range protection effect on a matrix; meanwhile, the SiC nano crystal whisker in the prepared composite material can improve the strength of the material and can enhance high temperature resistance of the material.

Silicon carbide whisker-aluminum oxide sub-micron particle multiscale modified ZrC-SiC multiphase ceramic powder preparation method

The invention relates to a porous composite material for generating electric arcs in microwaves and a preparation method thereof. The porous composite material comprises an inorganic porous skeleton and a carbon material loaded on the inorganic porous skeleton. The carbon material accounts for 0.001%-99% of the total mass of the porous composite material; the inorganic porous skeleton is an inorganic material with a porous structure, wherein the average pore diameter is 0.01-1000 microns and the porosity is 1%-99.99%. The porous composite material can be obtained by fully immersing the inorganic porous skeleton or an inorganic porous skeleton precursor into the carbon material and/or a carbon material precursor solution or dispersion liquid, and then heating, drying and carbonizing. The material has excellent mechanical properties, can generate electric arcs in a microwave field to quickly generate high temperature, and can be used in the fields of microwave high-temperature heating, biomass cracking, waste polymer material cracking, petrochemical cracking, carbon fiber composite material recovery, garbage treatment, VOC waste gas treatment, COD sewage treatment, high-temperature catalysis and the like.

Porous composite material for generating electric arcs in microwaves and preparation method thereof

Provided is a preparation method of a SiC nanowire reinforced C/C-SiC-ZrC ceramic matrix composite material. A biomass carbon source, silica sol and a mineralization agent are added into water to obtain a mixed solution; carbon fiber is impregnated in the mixed solution, drying is performed, then the mixture is subjected to microwave hydrothermal reaction, and then roasting is performed in the argon atmosphere to obtain a porous SiC nanowire reinforced C/C prefab, and a zirconium source, a silicon source, a biomass carbon source and a mineralization agent are added to deionized water to obtaina mixture. The SiC nanowire reinforced C/C-SiC-ZrC ceramic matrix composite material is impregnated and dried in the mixture, then microwave hydrothermal reaction is performed, and roasting is performed in the argon atmosphere. The preparation method has the advantages of simple process, environment friendliness and protection, short preparation cycle and high densification degree. In addition, SiC nanowires in the prepared composite material are generated in situ inside the material, the toughness and strength of the material are greatly improved, and the high-temperature resistance performance of the material is enhanced.

Preparation method of SiC nanowire reinforced C/C-SiC-ZrC ceramic matrix composite material

The invention discloses a preparation method of a SiCf/SiC composite material containing a co-deposited multiphase interface, which comprises the following steps: carrying out interface deposition ona SiC fiber preform by using a CVI process, and carrying out co-deposition by using propylene as a carbon source gas and trichloromethylsilane as a silicon carbide source gas, with carrier gas being hydrogen, and diluent gas being argon and hydrogen; performing SiC matrix deposition on the SiC fiber preform subjected to interface deposition through a CVI process, with trichloromethylsilane servingas silicon carbide source gas, hydrogen serving as carrier gas, and argon and hydrogen serving as diluent gas. According to the prepared SiCf/SiC composite material, a PyC-SiC multiphase interface isformed between the fibers and a matrix by co-deposition and is a multiphase interface composed of SiC nanocrystals and a pyrolytic carbon phase PyC. The method mainly comprises two main steps, namelyPyC-SiC multiphase interface preparation utilizing CVI codeposition and SiC matrix densification, so that the interface preparation is easier to control and the preparation efficiency is higher; andthe strength and toughness of the prepared SiCf/SiC composite material are further improved.

Preparation method of SiCf/SiC composite material containing co-deposited multiphase interface

The invention relates to a preparation method of a carbon fiber-reinforced multiphase carbide ceramic-based composite material. The preparation method comprises the following steps: adding a biomass carbon source into water to obtain mixed liquid; dipping carbon fiber into the mixed liquid and then performing microwave hydrothermal reaction to obtain a porous C/C prefab; adding water-soluble metalsalt, the biomass carbon source and a mineralizing agent into deionized water to obtain a mixture; or adding the water-soluble metal salt, a silicon source, the biomass carbon source and the mineralizing agent into deionized water to obtain a mixture; dipping the porous C/C prefab into the mixture, transferring into a microwave hydrothermal reaction kettle, adding oil into the microwave hydrothermal reaction kettle, performing microwave hydrothermal reaction and calcining in the atmosphere of argon. The carbon fiber-reinforced multiphase carbide ceramic-based composite material is prepared according to a microwave hydrothermal method, waste of the raw materials is reduced in the process and the utilization rate of the raw materials is well increased. The method has the advantages of simple process, environmental friendliness, short preparation cycle and high densification degree.

Preparation method of carbon fiber-reinforced multiphase carbide ceramic-based composite material

The invention relates to a preparation method of SiC/SiO2 nanometer string beads and belongs to the technical field of preparation of nanometer materials. The preparation method of the SiC/SiO2 nanometer string beads comprises the steps: mixing a glucose solution and silica sol uniformly, adjusting the pH value by using acetic acid to transform the silica sol into silica gel, putting the gel under a low-temperature environment and drying to be porous, and finally roasting under plasma flame and cooling to obtain the SiC/SiO2 nanometer string beads. The preparation method of the SiC/SiO2 nanometer string beads has the advantages of simple process, short preparation cycle, low cost and the like, and also has the advantages of high product yield, obvious string beam structure and the like. In addition, the SiC/SiO2 nanometer string beads prepared by the method is favorable for realizing efficient toughening effect on a matrix, and is favorable for reducing the phenomenon that the SiC/SiO2 nanometer string beads are pulled out of the matrix due to the special structure of the SiC/SiO2 nanometer string beads, thereby improving the toughening effect.

Preparation method of SiC/SiO2 nanometer string beads

The invention provides a preparation method for a SiC inner coating of a carbon-carbon composite material. The preparation method comprises the steps that the carbon-carbon composite material is taken as a base body sample, and the carbon-carbon sample is subjected to two steps of sand blasting treatment, pre-oxidized and coated with SiO2-Si-C powder prepared according to the certain mole mass ratio and then reacts in an argon atmosphere to obtain the SiC inner coating. The preparation method has the advantages that the processes are simple, the preparation cycle is short, the cost is low, no tail gas is generated, and the SiC inner coating with the uniform thickness can be obtained. In addition, the prepared SiC inner coating is well bonded with an outer coating, the surface of the inner coating is provided with SiC nanowires, and the inner coating is of a porous net structure.

Preparation method for SiC inner coating of carbon-carbon composite material

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Li Cuiyan

Author Tools

Chat about Author

Papers

Preparation method of carbon fiber-reinforced multiphase carbide ceramic-based composite material

Preparation method of SiC/SiO2 nanometer string beads

Preparation method of SiC nanowire reinforced C/C-SiC-ZrC ceramic matrix composite material

Preparation method for SiC inner coating of carbon-carbon composite material