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Research and Application of Rare Earth Tungsten Electrode Materials Fangfang Zhanga, Jiancan Yangb and Lin Huangc School of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China a1512746555@qq.com, bjcan@jut.edu.cn, c502232968@qq.com Keywords: Rare earth tungsten electrode, Thermionic emission, Performance.
International Journal of Refractory Metals and Hard Materials, 2015, 48: 19-23.
International Journal of Refractory Metals and Hard Materials, 2010, 28(6): 687-691
Ordannce Material Science and Engineering, 2006, 24(4):61-64.
International Journal of Refractory Metals and Hard Materials, 2014 (In Chinese)

This reproductive process exploits the physical phenomenon of material erosion of conductive materials by means of electrical discharges.
Acknowledgements This paper is supported by the National Science Foundation of China(50275087).
Wang: submitted to Journal of Magnetism and Magnetic Materials (2006)
LAu: Journal of Material Processing Technology 63 (1997), p. 908
Bleys: Journal of Material Processing Technology 149 (2004), p.347.

Miyake 3d 1 3-26 kamitenma-cyo nishi-ku hiroshima-shi Japan Tsuchiyoshi Industry Corporation 2 (former Chubu Science Technology Center, Japan 3 3-3-35 yamate-cho suita-shi Japan Kansai University a kambayashi.h@tyco.co.jp, b kurokawa.y@tyco.co.jp, c hosiyama@ipcku.kansai-u.ac.jp, d miyake@ipcku.kansai-u.ac.jp Keywords: casting defect, SEM, EPMA, pin hole, inclusion, penetration, blow hole, shrinkage, orange peel, cold shut, cracks, veining Abstract Authors have reported theses concerning the cast defect for publication in journal of Japanese Foundry Engineering Society and AFS Transactions.
Materials which are responsible for inclusion defects were immersed into a molten metal and subjected to SEM ⋅ EDS analysis.
Ota: Journal of Japan Foundry Engineering Society Vol 70(1998), p.495, "SEM Observation of Pin Hole Defects in Cast Iron by Green Sand Mold" [2] Y.
Ota: Journal of Japan Foundry Engineering Society Vol 73(2001), p.258, "Classification of Pin Hole Defect of Iron Casting" [3] Y.
Miyake: Journal of Japan Foundry Engineering Society Vol 74(2002), p.298, "Observation of Penetration Defects Occurring in Cast Iron and Cast Steel" [4] Y.

Fig.6 SEM micrograph and EDS Spectrum of BN30N5 Conclusions The high comprehensive mechanical properties of multi-scale TiB2 matrix ceramic tool materials were obtained at 1600 oC with 8vol.% nano-scale TiN.
The sintering temperature was lowered because of the addition of metal phase, also the metal phase could improve the combined strength among particles and create ductility toughening in the ceramic tool materials.
Kim: Journal of Materials Science.
Wang and et al.: Journal of the Chinese Ceramic Society Vol. 28 (3) (2000), pp.275.
Wang: Key Engineering Materials, Vol. 315-316 (2006), pp.123.

., Luoyang 471039, China 2School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China a635098742@qq.com, bliugq@lirrc.com Keywords: Silicon nitride ceramics; additives; thermal conductivity Abstract.
[10] Watari K, Hirao K, Brito M E, et al, Factors to enhance enhance thermal conducticity of beta-Si3N4 ceramics, Advances in Technology of Materials and Materials Processing Journal(ATM), 2005, 7(2): 191-202
[18] Matovic, B., et al, Thermal Conductivity of Pressureless Sintered Silicon Nitride Materials with LiYO2 Additive, Science of Sintering 36.1 (2004): 3-9
Jae-Woong, et al, Microstructure and thermal conductivity of sintered reaction-bonded silicon nitride: The particle size effects of MgO additive, Advances in Materials Science and Engineering, 2018, 2018:1-5
[26] Y.S.Duan , J.S.Zzhang , Rare earth oxides on property of pressureless sintered Si3N4 ceramics, Journal of Inorganic Materials , 2017, 32(12):1275-1279

Experimental Study By Using Drilling Core Materials Inversion Formation Rock Fracture Toughness Test Research Lun Zhu Northeast Petroleum University , Daqing, 163318, China Mnvu7580@gmail.com Keywords: fracture toughness;hydraulic fracturing ;parameter inversion ;rock mechanics Abstract.
Chinese Journal of rock mechanics and engineering rock fractal crack hydraulic fracturing method. 2009 (S1) [2] Chen Zhi, Chen Mian, Jin Yan, Huang Rongzun.
Chinese Journal of rock mechanics and engineering, 1997 (01) [3] Irwin，G.
Journal of Applied Mechanics . 1957 [4] Clifton RJ，Simonson ER，Jones AH，Green SJ.
J. of Petroleum Science and Engineering . 2002 [7] S.

Ten supporting journals, including Journal of Inorganic and Organometallic Polymers and Materials (JIOPM; Springer), Monatshefte für Chemie - Chemical Monthly (CM; Springer) Journal of the Chinese Advanced Materials Society (JCAMS; Taylor Francis), Journal of Energetic Materials (JEM; Taylor & Francis), Journal of Nano Research (JNanoR; Trans Tech), Polymers & Polymer Composites (PPC; Smithers Rapra), Current Organic Chemistry (COC; Bentham Science), Key Engineering Materials (KEM; Trans Tech), The Open Electrochemistry Journal (TOEJ; Bentham Science), and American Journal of Environmental Science (AJES; Science publications), have included ca. 700 full manuscripts contributed and 315 abstracts.
H Fujii (National Institute for Materials Science, Japan) Dr.
Kumakura (National Institute for Materials Science, Japan) Dr.
K Togano (National Institute for Materials Science, Japan) Dr.
Korea) Sponsors Jiangsu University University of Jinan State Key Laboratory of Bioreactor Engineering (East China University of Science and Technology) Hengyang Normal University Journal of Inorganic and Organometallic Polymers and Materials (JIOPM; Springer), Monatshefte für Chemie - Chemical Monthly (CM; Springer) Journal of the Chinese Advanced Materials Society (JCAMS; Taylor Francis) Journal of Energetic Materials (JEM; Taylor & Francis) Journal of Nano Research (JNanoR; Trans Tech) Polymers & Polymer Composites (PPC; Smithers Rapra) Current Organic Chemistry (COC; Bentham Science) Key Engineering Materials (KEM; Trans Tech) The Open Electrochemistry Journal (TOEJ; Bentham Science) American Journal of Environmental Science (AJES; Science publications).

International Journal of Polymeric Materials 56 (3) (2007) 327-338
Journal of Magnetism and Magnetic Materials 324 (5) (2012). 755-760
Materials Science and Engineering B 117 (2005). 27-36
Materials Science and Engineering B. 156 (2009).24-31
Journal of Materials Processing Technology 160 (2005) 229-233

Brouwer, Microstructure characterisation and mechanical properties of ODS Eurofersteel subject to designed heat treatments, Materials Science & Engineering, Page-138568, (2020)
[4] AtanuSaha, Dipak Kumar Mondalb,Effect of cyclic heat treatment on microstructure and mechanical properties o 0.6 wt% carbon steel, Materials Science and Engineering, Pages- 4001–4007, (2010)
Gammer, Effect of heat treatment on microstructure and mechanical properties of 316L steel synthesized by selective laser melting, Materials Science & Engineering, Pages-205–212, (2019)
[11] HanlinPeng, Ling Hu, Effects of austenitizing temperature on microstructure and mechanical property of a 4-GPa-grade PM high-speed steel, Materials Science & Engineering, Pages-21-26, (2018)
Saber, Mechanical and microstructure characteristics of heat-treated of high-Cr WI and AISI4140 steel bimetal beams, Journal of materials research and technology, Pages-7926-7936, (2020).

The corresponding properties for such materials are presented in Tables 1 and 2.
Table 1 – Properties of selected materials.
International Journal of Mechanical Sciences, 1997. 39(7): p. 761-769
International Journal of Mechanical Sciences, 1979. 21(8): p. 457-465
Science Technology, Doct.