scholarly journals Addressing Amorphization and Transgranular Fracture of B 4 C through Si Doping and TiB 2 Microparticle Reinforcing

2021 ◽  
Author(s):  
Chawon Hwang ◽  
Jun Du ◽  
Qirong Yang ◽  
Azmi M. Celik ◽  
Kent Christian ◽  
...  
Keyword(s):  
Transgranular Fracture ◽  
Si Doping

A collaborative strategy with ionic conductive Na2SiO3 coating and Si doping of P2-Na0.67Fe0.5Mn0.5O2 cathode: An effective solution to capacity attenuation

2021 ◽  
Vol 384 ◽  
pp. 138362
Author(s):  
Jianyue Jiao ◽  
Kang Wu ◽  
Rongbin Dang ◽  
Na Li ◽  
Xin Deng ◽  
...  
Keyword(s):  
Effective Solution ◽  
Si Doping

Effect of Hydrogenated Water on Fatigue Crack Growth for Austenitic Stainless Steel in Simulated BWR Water Environment

2004 ◽  
Author(s):  
Li H. Wang
Keyword(s):  
Stainless Steel ◽  
Fatigue Crack ◽  
Cyclic Loading ◽  
Austenitic Stainless Steel ◽  
Fatigue Crack Growth ◽  
Water Chemistry ◽  
Crack Growth ◽  
Growth Stage ◽  
Transgranular Fracture ◽  
Cyclic Loading Condition

Fatigue crack growth rates (FCGR) of sensitized austenitic stainless steel (SS) were measured in simulated BWR water at 288 °C using compact tension specimens under different cyclic loading modes, including saw-tooth, trapezoidal and constant loading pattern. This study tested sensitized SS in normal water chemistry (NWC) and hydrogen water chemistry (HWC) respectively, and attempted to clarify the effect of low electrochemical corrosion potential on the FCGR of sensitized stainless steel. Significant environment effects on FCGR of sensitized stainless steel were observed in both water chemistries when compared with air fatigue curve. The pronounced suppression effect of HWC on crack growth in statically sustained load was not observed in cyclic loading condition. ASME curve doesn’t seem to be conservative and could not bound all the FCGR data tested in this study. In contrast, all of the measured FCGR data were bound by the JSME disposition curve. PLEDGE model proposed by General Electric reasonably predicted the FCGR of sensitized SS in NWC, but underestimated the FCGR in HWC. ANL’s superposition model successfully estimated the FCGR measured in both water chemistries. The fractography exhibited transgranular fracture mode during the crack initiation and growth stage. No differences in the appearance of fracture surface were observed in HWC and NWC. Only in very high DO environments, the sensitized 304 SS exhibited the mixed mode of intergranular and transgranular during growth stage.

Carrier Concentration Saturation of Double Si Doping Layers in GaAs

1996 ◽  
Vol 35 (Part 2, No. 9B) ◽  
pp. L1151-L1154 ◽  
Author(s):  
Zhongling Peng ◽  
Yoshiji Horikoshi
Keyword(s):  
Carrier Concentration ◽  
Si Doping

Microstructure and Mechanical Properties of Multi-Scale Titanium Diboride Matrix Nanocomposite Ceramic Tool Materials

2010 ◽  
Vol 431-432 ◽  
pp. 523-526
Author(s):  
Han Lian Liu ◽  
Chuan Zhen Huang ◽  
Shou Rong Xiao ◽  
Hui Wang ◽  
Ming Hong
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Transgranular Fracture ◽  
Ceramic Tool ◽  
Tool Materials ◽  
Micro Scale ◽  
Multi Scale ◽  
Nano Scale ◽  
Matrix Nanocomposite

Under the liquid-phase hot-pressing technique, the multi-scale titanium diboride matrix nanocomposite ceramic tool materials were fabricated by adding both micro-scale and nano-scale TiN particles into TiB2 with Ni and Mo as sintering aids. The effect of content of nano-scale TiN and sintering temperature on the microstructure and mechanical properties was studied. The result showed that flexural strength and fracture toughness of the composites increased first, and then decreased with an increase of the content of nano-scale TiN, while the Vickers hardness decreased with an increase of the content of nano-scale TiN. The optimal mechanical properties were flexural strength 742 MPa, fracture toughness 6.5 MPa•m1/2 and Vickers hardness 17GPa respectively. The intergranular and transgranular fracture mode were observed in the composites. The metal phase can cause ductility toughening and crack bridging, while crack deflection and transgranular fracture mode could be brought by micro-scale TiN and nano-scale TiN respectively.

Suppression of quadrupolar order on Si doping in Y bRu2(Ge1 −xSix)2

2010 ◽  
Vol 22 (12) ◽  
pp. 126004 ◽  
Author(s):  
A Prasad ◽  
H S Jeevan ◽  
C Geibel ◽  
Z Hossain
Keyword(s):  
Si Doping ◽  
Quadrupolar Order

Si-doping increases the adjuvant activity of hydroxyapatite nanorods

2019 ◽  
Vol 174 ◽  
pp. 300-307 ◽  
Author(s):  
Xiupeng Wang ◽  
Shu Ihara ◽  
Xia Li ◽  
Atsuo Ito ◽  
Yu Sogo ◽  
...  
Keyword(s):  
Adjuvant Activity ◽  
Si Doping
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