Fabrication of α-Si3N4 nanobelts assembled by Si3N4 microcrystals on the nanowires via crystallization of amorphous Si3N4 powders

2019 ◽  
Vol 45 (12) ◽  
pp. 15758-15762 ◽  
Author(s):  
Zunlan Hu ◽  
Yiyao Ge ◽  
Jian Liu ◽  
Zhipeng Xie
Keyword(s):  
Amorphous Si3n4

Surface Alteration of Amorphous Si3N4 Films by ArF Excimer Laser Irradiation

1995 ◽  
Vol 34 (Part 2, No. 11A) ◽  
pp. L1482-L1485 ◽  
Author(s):  
Kazuo Nakamae ◽  
Kou Kurosawa ◽  
Yasuo Takigawa ◽  
Wataru Sasaki ◽  
Yasukazu Izawa ◽  
...  
Keyword(s):  
Laser Irradiation ◽  
Excimer Laser ◽  
Surface Alteration ◽  
Excimer Laser Irradiation ◽  
Arf Excimer Laser ◽  
Amorphous Si3n4

scholarly journals Structural and Mechanical Properties of Amorphous Si3N4 Nanoparticles Reinforced Al Matrix Composites Prepared by Microwave Sintering

Ceramics ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 126-134 ◽  
Author(s):  
Manohar Mattli ◽  
Penchal Matli ◽  
Abdul Shakoor ◽  
Adel Amer Mohamed
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Yield Strength ◽  
Volume Fraction ◽  
Microwave Sintering ◽  
Aluminum Matrix ◽  
Microstructural Investigation ◽  
Porosity Level ◽  
Amorphous Si3n4 ◽  
Al Matrix

The present study focuses on the synthesis and characterization of amorphous silicon nitride (Si3N4) reinforced aluminum matrix nanocomposites through the microwave sintering process. The effect of Si3N4 (0, 1, 2 and 3 wt.%) nanoparticles addition to the microstructure and mechanical properties of the Al-Si3N4 nanocomposites were investigated. The density of Al-Si3N4 nanocomposites increased with increased Si3N4 content, while porosity decreased. X-ray diffraction (XRD) analysis reveals the presence of Si3N4 nanoparticles in Al matrix. Microstructural investigation of the nanocomposites shows the uniform distribution of Si3N4 nanoparticles in the aluminum matrix. Mechanical properties of the composites were found to increase with an increasing volume fraction of amorphous Si3N4 reinforcement particles. Al-Si3N4 nanocomposites exhibits higher hardness, yield strength and enhanced compressive performance than the pure Al matrix. A maximum increase of approximately 72% and 37% in ultimate compressive strength and 0.2% yield strength are achieved. Among the synthesized nanocomposites, Al-3wt.% Si3N4 nanocomposites displayed the maximum hardness (77 ± 2 Hv) and compressive strength (364 ± 2 MPa) with minimum porosity level of 1.1%.

Enhanced thermoelectric performance of BiSbTe-based composites incorporated with amorphous Si3N4 nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (43) ◽  
pp. 34251-34256 ◽  
Author(s):  
Y. C. Dou ◽  
X. Y. Qin ◽  
D. Li ◽  
Y. Y. Li ◽  
H. X. Xin ◽  
...  
Keyword(s):  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Temperature Range ◽  
Amorphous Si ◽  
Amorphous Si3n4

Thermoelectric properties of BiSbTe-based composites dispersed with a small amount (<1 vol%) of amorphous Si3N4 (a-Si3N4) nanoparticles (∼25 nm) were investigated in the temperature range from 303 K to 483 K.

Synthesizing Silicon Nitride Whiskers by Solvothermal and Carbothermal Methods

2008 ◽  
Vol 368-372 ◽  
pp. 868-870
Author(s):  
Guo Qiang Tan ◽  
Hong Yan Miao ◽  
Hui Jun Ren ◽  
Zhi Wei Yu ◽  
Jia Li ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Ethyl Ester ◽  
Solvothermal Method ◽  
Raw Materials ◽  
Sol Gel ◽  
Heat Treating ◽  
Gel Method ◽  
Sol Gel Method ◽  
Precursor Powders ◽  
Amorphous Si3n4

Xerogel was prepared by the sol-gel method using ethyl ester orthosilicate, alcohol, carbamide and glucose with various contents as raw materials. The precursor powders were obtained after xerogel was solvothermally treated at 220oC for 2.5 h. IR analyses showed that the Si-O-Si and Si-O-NH2 bond are obtained in the precursors. XRD analyses indicated that the powders prepared by the solvothermal method are amorphous. Si3N4 powders are produced by heat-treating the precursors at 1400 oC in N2. It was proved that the synthesized powders are α–Si3N4 whiskers. With the increase of the glucose contents and the heat-treating temperature, the crystallization of Si3N4 is obviously improved.

Crystallization of amorphous Si3N4 and superhardness effect in HfC/Si3N4 nanomultilayers

2011 ◽  
Vol 257 (13) ◽  
pp. 5799-5802 ◽  
Author(s):  
Guanqun Li ◽  
Yuge Li ◽  
Geyang Li
Keyword(s):  
Amorphous Si3n4

Mechanical Properties of Nanocomposite TiN/Si3N4 Films Synthesized by Ion Beam Assisted Deposition (IBAD)

2003 ◽  
Vol 125 (2) ◽  
pp. 445-447 ◽  
Author(s):  
Chenhui Zhang ◽  
Jianbin Luo ◽  
Wenzhi Li ◽  
Darong Chen
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Ion Beam ◽  
Nanocomposite Coatings ◽  
Ion Beam Assisted Deposition ◽  
Aisi 52100 ◽  
Aisi 52100 Steel ◽  
Nanoindentation Hardness ◽  
Si3n4 Film ◽  
Amorphous Si3n4

Nanocomposite coatings of TiN/Si3N4 have been prepared by ion beam assisted deposition (IBAD): simultaneous sputtering of Ti and Si targets and film bombardment by N2+ ions at 1000 eV. The Si/Ti ratio in the film varies from 0 to 0.9. The coatings are composed of amorphous Si3N4 and TiN nanocrystals with grain size of several nanometers. Such nanocomposites exhibit improved mechanical properties in comparison with TiN or Si3N4 deposited under the same conditions. The nanoindentation hardness of TiN/Si3N4 film at the Si/Ti ratio of 0.3 reaches a maximum of 42 GPa, compared with 22 GPa for TiN and 18 GPa for Si3N4. The wear resistance of AISI 52100 steel coated with these nanocomposite coatings is increased about three times.

Properties of Ti-Si-N Nanocomposite Coatings Deposited by Closed-Field Unbalanced Magnetron Sputtering

2005 ◽  
Author(s):  
C. H. Zhang ◽  
X. C. Lu ◽  
J. B. Luo ◽  
Y. G. Shen ◽  
K. Y. Li
Keyword(s):  
Magnetron Sputtering ◽  
Analytical Techniques ◽  
Closed Field ◽  
Maximum Hardness ◽  
Tin Coating ◽  
Wear Performance ◽  
Unbalanced Magnetron Sputtering ◽  
Unbalanced Magnetron ◽  
Si Content ◽  
Amorphous Si3n4

Ti-Si-N coatings with different silicon contents were deposited by reactive magnetron sputtering. These coatings were characterized and analyzed by using a variety of analytical techniques. The Ti-Si-N coating shows a denser structure as compared with TiN coating, and consists of TiN crystallites and amorphous Si3N4 phase. The maximum hardness and Young’s Modulus of 52 GPa and 360 GPa respectively are achieved as the Si content was 8.6 at.%. The Ti-Si-N coating with 8.6 at.% Si shows the excellent oxidation resistance behavior and perfect anti-wear performance.

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