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| 1 | Brazing of WC–8Co cemented carbide to steel using Cu–Ni–Al alloys as filler metal: Microstructures and joint mechanical behavior显示文摘Three novel Cu–Ni–Al brazing filler alloys with Cu/Ni weight ratio of 4:1 and 2.5–10 wt% Al were developed and characterized, and the wetting of three Cu–Ni–Al alloys on WC–8 Co cemented carbide were investigated at 1190–1210?C by the sessile drop technique. Vacuum brazing of the WC–8 Co cemented carbide to SAE1045 steel using the three Cu–Ni–Al alloys as filler metal was further carried out based on the wetting test results. The interfacial interactions and joint mechanical behaviors involving microhardness, shear strength and fracture were analyzed and discussed. The experimental results show that all the three wetting systems present excellent wettability with final contact angles of less than 5?and fast spreading. An obvious degeneration layer with continuous thin strip forms in the cemented carbide adjacent to the Cu–Ni–Al/WC–8 Co interface. The variation of microhardness in the joint cross-section is closely related to the interactions(such as diffusion and solid solution) of WC–8 Co/Cu–Ni–Al/steel system. Compared with the other two brazed joints, the WC–8 Co/Cu–19 Ni–5 Al/steel brazed joint presents more reliable interlayer microstructure and mechanical property while brazing at the corresponding wetting temperatures for 5 min, and its average shear strength is over 200 MPa after further optimizing the brazing temperature and holding time. The joint shear fracture path passes along the degeneration layer, Cu–Ni–Al/WC–8 Co interface and brazing interlayer, showing a mixed ductile-brittle fracture. | Xiangzhao Zhang Guiwu Liu Junnan Tao Yajie Guo Jingjing Wang Guanjun Qiao | 2018 | Journal of Materials Science & Technology2018，34，7： | 6 |
| 2 | Thermal deformation behavior and microstructure of nuclear austenitic stainless steel显示文摘Gleeble-1500D thermal simulation tester was employed in the hot-compression investigation of as-cast nuclear 304 austenitic stainless steel under conditions: deformation temperature 950―1200℃; deformations 30% and 50%; deformation rates 0.01 and 0.1 s?1. The results show that the flow stress decreases with temperature rise under the same strain rate and deformation, that the flow stress increases with deformation under the same temperature and strain rate, and that the flow stress increases with strain rate under the same temperature condition, i.e., work hardening becomes distinct. Materials exhibit better strength-toughness when the strain rate is 0.01 s-1, the deformation is 50%, and the temperature is 1050℃. | LIU Jie FAN GuangWei HAN PeiDe LIU JianSheng GE DongSheng QIAO GuanJun | 2009 | Science China(Technological Sciences)2009，52，8： | 4 |
| 3 | The mechanical properties of co-continuous Si 3 N 4 /Al composites manufactured by squeeze casting显示文摘 | Yuan Lu Jianfeng Yang Weizhong Lu Rongzhen Liu Guanjun Qiao Chonggao Bao | 2010 | Materials Science & Engineering A2010，，23： | 2 |
| 4 | Molecular dynamics simulation of graphene sinking during chemical vapor deposition growth on semi-molten Cu substrate显示文摘Copper foil is the most promising catalyst for the synthesis of large-area,high-quality monolayer graphene.Experimentally,it has been found that the Cu substrate is semi-molten at graphene growth temperatures.In this study,based on a self-developed C–Cu empirical potential and density functional theory(DFT)methods,we performed systematic molecular dynamics simulations to explore the stability of graphene nanostructures,i.e.,carbon nanoclusters and graphene nanoribbons,on semi-molten Cu substrates. | Ziwei Xu Guanghui Zhao Lu Qiu Xiuyun Zhang Guanjun Qiao Feng Ding | 2020 | npj Computational Materials2020，，1： | 2 |
| 5 | Thermal Shock Resistance of Nano SiC-BN Composites显示文摘Nano SiC-BN composite powders were prepared by dissolving analytically pure H3BO3 and CO(NH2)2 with the mole ratio of 1:2.5 in the absolute alcohol, adding 80% β-SiC with 0.2 μm average grain size while stirring, firing at 850 ℃ in nitrogen (purity: 99.99%, pressure: 0.92-0.93 MPa) for 15 h. Nano SiC-BN composite specimens were prepared by hot-pressed sintering the nano SiC-BN composite powder in N2 atmosphere with 0.92-0.93 MPa and at 30 MPa axial pressure for 0.5-1 h at 1 750-1 800 ℃. The thermal shock resistance of nano SiC-BN composites was studied by three-point bending, TEM and SEM. The results show that, adding BN can decrease the modulus of elasticity of SiC materials, which improves thermal shock resistance; furthermore, because of the large difference of thermal expansion coefficient between matrix SiC and second phase hexa-BN, thermal mismatch effect results in intercrystalline delamination of h-BN grains and forming many micropores in composite ceramic, which can relax the thermal expansion caused by high temperature effectively, and improve the thermal shock resistance significantly. | YANG Gangbin XI Xiaojing QIAO Guanjun JIN Zhihao | 2009 | China's Refractories2009，18，1： | 2 |
| 6 | A comparative study on constitutive relationship of as-cast 904L austenitic stainless steel during hot deformation based on Arrhenius-type and artificial neural network models显示文摘 | Ying Han Guanjun Qiao JiaPeng Sun Dening Zou | 2013 | Computational Materials Science2013，，： | 1 |
| 7 | Preparation and characterization of SiC nanowires and nanoparticles from filter paper by sol–gel and carbothermal reduction processing显示文摘 | Wei Wang ZhiHao Jin Tao Xue GangBin Yang GuanJun Qiao | 2007 | Journal of Materials Science2007，，15： | 1 |
| 8 | A rapid fabrication of C/C composites by a thermal gradient chemical vapor infiltration method with vaporized kerosene as a precursor显示文摘 | Wang Jiping Qian Junmin Qiao Guanjun | 2007 | Materials Chemistry and Physics2007，101，： | 1 |
| 9 | Improvement of film boiling chemical vapor infiltration process for fabrication of large size C/C composite显示文摘 | Wang Jiping Qian Junmin Qiao Guanjun | 2006 | Materials Letters2006，60，910： | 1 |
| 10 | Reaction forming of silicon carbide ceramic using phenolic resin derived porous carbon preform显示文摘 | Shunjian Xu Guanjun Qiao Dichen Li Hong Yang Yinong Liu Tianjian Lu | 2009 | Journal of the European Ceramic Society2009，，11： | 1 |
| 11 | Fabrication of silicon nitride/ boron nitride nanocomposite powder显示文摘Si3N4/BN nanocomposite powders with the mi-crostructure of the micro-sized a-Si3N4 particles coated with nano-sized BN particles were synthesized via the chemical reaction of boric acid, urea, and a-Si3N4 powder in a hydro-gen gas. The results of XRD, TEM, and selected area elec-tron diffraction showed that amorphous BN and a little amount of turbostratic BN(t-BN) were coated on Si3N4 parti-cles as the second phase after reaction at 1100℃. After re-heating the composite powders at 1450℃ in a nitrogen gas, the amorphous and turbostratic BN is transformed into h-BN. These nanocomposite powders can be used to prepare Si3N4/BN ceramic composites by hot-pressing at 1800℃, which have perfect machinability and can be drilled with normal metal tools. | WANG Xiangdong QIAO Guanjun Kusunose Takafumi JIN Zhihao | 2003 | Chinese Science Bulletin2003，48，5： | 1 |
| 12 | 显示文摘 | Qian Junmin Wang Jiping Qiao Guanjun | 2004 | Journal of the European Ceramic Society2004，24，： | 1 |
| 13 | Deformation behavior and microstructural evolution of as-cast 904L austenitic stainless steel during hot compression显示文摘 | Ying Han Guiwu Liu Dening Zou Rong Liu Guanjun Qiao | 2012 | Materials Science & Engineering A2012，，： | 1 |
| 14 | Fabrication of ma- chinable silicon carbide-boron nitride ceramic nanocomposi- tes显示文摘 | Wang Xiangdong Qiao Guanjun | 2004 | J Am Ceram Soc2004，87，4： | 1 |
| 15 | Preparation of SiC/ BN nanocomposite powders by chemical processing显示文摘 | Wang Xiangdong Qiao Guanjun | 2004 | Ma- ter Lett2004，58，： | 1 |
| 16 | Incorporating conductor paste in a low-temperature fabrication process for large mesoporous carbon counter electrode in dye-sensitized solar cells显示文摘 | Shunjian Xu Guiwu Liu Jie Li Guanjun Qiao | 2012 | Electrochimica Acta2012，，： | 1 |
| 17 | Machinable Al2O3/BN composite ceramics with strong mechanical properties 显示文摘 | Li Yongli Qiao Guanjun | 2002 | Mater Res Bull2002，37，8： | 1 |
| 18 | Effects of weak boundary phases (WBP) on the microstructure and mechanical properties of pressureless sintered Al2O3/h-BN machinable composites 显示文摘 | SHI Zhongqi WANG Jiping QIAO Guanjun | 2008 | Mater Sci EngA2008，492，： | 1 |
| 19 | Preparation of Eu 2+ -doped AlN phosphors by plasma activated sintering显示文摘 | Zhongqi Shi Wanli Yang Shujie Bai Guanjun Qiao Zhihao Jin | 2011 | Ceramics International2011，，6： | 1 |
| 20 | Pore structure control of mesoporous carbon monoliths derived from mixtures of phenolic resin and ethylene glycol显示文摘 | Shunjian Xu Jie Li Guanjun Qiao Hongjie Wang Tianjian Lu | 2009 | Carbon2009，，8： | 1 |
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