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Zhang: Journal of Earth Sciences and Environment Vol. 28 (4) (2006), p. 92（in Chinese） [7] Z.G.
Xue: Science of Soil and Water Conservation Vol. 10 (2) (2012), p. 107（in Chinese） [12] M.
Xu: Science of Soil and Water Conservation Vol. 4 (Supp.) (2006), p. 138（in Chinese） [20] J.L.
Journal of Pingdingshan Institute of Technology Vol. 14 (6) (2005), p. 1（in Chinese） [25] C.G.
Sun, et al: Chinese Journal of Ecology Vol. 31 (2) (2012), p. 460（in Chinese）

Han: Corrosion Science, Vol. 53 (2011), p.1537
Han: Corrosion Science, Vol. 73 (2013), p.262
Mazille: Journal of Materials Science, Vol. 36 (2001), p.557
Cetre: Corrosion Science, Vol. 43 (2001), p.627
Osaka: Journal of the Electrochemical Society, Vol. 134 (1987), p.2993

Lithium titanate(Li2TiO3) in form of packed pebble bed is promising concept for breeder material in the fusion reactor blanket, and worldwide efforts have been dedicated to its R&D in the last two decade.
There are two major material-form options for the tritium which are breeder sintered block and pebble bed.
So the pebble bed was proposed as a material form for the tritium breeders in fusion blankets.
Acknowledgements This work was financially supported by Important National Science & Technology Specific Projects (2011GB113002) References [1] M.
[3] A.Abou-sena, Alice Ying, et al., Experimental measurements of the effective thermal conductivity of a lithium titanate (Li2TiO3) pebbles-packed bed , Journal of Materials Processing Technology, 181(2007) 206-212

Journal of Thermoplastic Composite Materials, 2024. 38(3): p. 933-949
Journal of Thermoplastic Composite Materials, 2017. 31(12): p. 1676-1725
Journal of Thermoplastic Composite Materials, 2019. 34(9): p. 1299-1312
Journal of Thermoplastic Composite Materials, 2019. 35(3): p. 303-319
Journal of Thermoplastic Composite Materials, 2023. 37(8): p. 2775-2801.

Materials and Methods Materials and Reagents.
The one-year young leaves and twigs were collected as materials from mature trees of C. camphora planted in the botanical garden of forestry academy of Hunan porvince in the suburb of Changsha city, China.
Summary The GC/MS-based result showed that the benzene/ethanol extractives of twigs and leaves of C. camphora are abundant in materials of noble natural medicines, cosmetic and spicery, which can be developed into top value-added materials of biomedicine, cosmetic and spicery, providing scientific foundation for non-pollutive recovery and high-grade utilization of twigs and leaves of C. camphora.
Dai: JiangXi Forestry Science and Technology Vol. 6 (2007), p. 30 [4] J.
Goh: Journal of Tropical Forest Science Vol. 6 (1994), p. 286 [5] Y.Z.

Experimental The materials used in this work were commercial pure Al, K2ZrF4 and KBF4 powder.
Ebert, Magnesium alloy: properties-applications-potential, Materials Science and Engineering A. 302(2001) 37-45
Qin, Effects of minor Zr and Sr on as-cast microstructure and mechanical properties of Mg-3Ce-1.2Mn-1Zn magnesium alloy, Journal of Materials Science. 46(2011) 3216-3224
Mark, Grain refinement of magnesium alloys, Metallurgical and Materials Transactions A. 36(2005) 1669-1679
Zhang, The design, casting of an experimental Al-Zr-B alloy and its deformation characteristics, Journal of Aeronautical Materials. 21(2001) 1-4

Experiment Materials and preparation of the slags.
The materials used in the present work include reagent grade MgO, Al2O3, SiO2, CaO, Cu2O, Fe3O4, Fe2O3 and iron.
Kojo: ICHNM’ 2002 a New Century International Conference on Metallurgical High Technology and New Materials of Heavy Nonferrous Metals (Kunming, China, April, 2002), p.19
Wang: The Open Materials Science Journal, Vol. 5(2011), p.9
Jak: Metallurgical and Materials Transactions B, Vol. 35(2004) No.2, p.203.

Therefore, the study of corrosion resistance of MAX phase materials in lead-based alloys has important reference value for the application of these materials in advanced nuclear power systems.
The wetting behavior between liquid metals and structural materials can qualitatively reflect the adsorption force of structural materials on liquid metal atoms.
University of Chinese Academy of Sciences, Institute of Chemistry, Chinese Academy of Sciences. 2012
Journal of Nuclear Materials, 482 (2016) 114-123
Beijing: Science Press. (2004) 1-2.

It provides the material conditions for the formation of shale gas and oil.
Earth Science Frontiers, 19(5)(2012)322-331
Journal of Xi'an Shiyou University(Natural Science Edition), 25(2)(2010)1-5
Earth Science Frontiers, 19(5)(2012)348-355
Journal of Shandong University of Science and Technology(Natural Science), 31(5)(2012)63-70

For the soil is a very complex natural material, significant strain gradient effect exist in soil analysis.
Plastic strain gradient is actually a phenomenological non-local model containing microstructure information of the material.
Based on the analysis of micro view, a number of specific physical and mechanical properties of the granular material are created by the discontinuity of certain physical space.
Conclusion Refer to metal and composite materials research, we add the plastic strain gradient hardening item into the traditional Cambridge yield surface .Using the consistency conditions and flow rule, we get plastic strain gradient stiffness matrix and show the strain gradient finite element method.
References [1] XuSongLin:Chinese Journal of Rock Mechanics and Engineering Vol. 20(2)(2001) ,p.58.In Chinese [2] ChenGang,Yishan Pan: Rock and Soil Mechanics Vol. 5(2004), p. 694.