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Materials Science Forum 600–603 (2009)119 [7] M.
Pedersen, Materials Research Bulletin 46 (2011) 1272-1275 [13] T.
Ohashi, Materials Science Forum 717–720 (2012) 101–104 [14] T.
Fukuda, H.Okumura, Materials Science Forum 645–648 (2010) 763–765
Sudarshan, Materials Science Forum 600–603 (2009) 139–142 [16] V.

Rock mass is heterogeneous brittle material and its deformation characteristic has marked difference from metallic materials.
Acknowledgements The work was financially supported by the National Key Basic Research and Development Program(973 Program NO.2010CB732002)， the National Natural Science Foundation of China（NO.51179098）and the Natural Science Foundation of Shandong Province (NO. 2009ZRB02285) References [1] Yinlong Lu，Lianguo Wang, Feng Yang: Chinese Journal of Rock Mechanics and Engineering，2010，29(3)：640–648.
:International Journal of Rock Mechanics and Mining Science, 2001，38(8)：1 193–1 199
[8]Zhujiang Shen: Journal of Jiang Su Mechanics，1982，(6)：1–9.
(In Chinese) [9]Xuebin Wang: Chinese Journal of Rock Mechanics and Engineering，2004，23(Supp.1)：4 292–4 295.

Journal of Hazardous Materials, 2009, 171(1-3): 588 [3] Liping Ma, Ping Ning, Yuanyuan Zhang, Xueqian Wang.
Journal of Rare Earths, 2010, 28(2): 205 [5] Qiongfen Yu, Ping Ning, Honghong Yi, Xiaolong Tang, Ming LI, Liping Yang.
Chinese Journal of Chemical Engineering, 2008, 16(5): 715 [7] Ping Ning, Hans-Jörg Bart, Liping Ma, Xueqian Wang.
Engineering Science, 2004, 2(4): 20 [8] Ping Ning, Xueqian Wang, Hans-Jörg Bart, Senlin Tian, Yong Zhang, Xueqian Wang.
Journal of Cleaner Production, 2011, 19(13): 1547 [9] Zhonghua Wang, Ming Jiang, Ping Ning, Gang Xie.

Dargusch: Thermally enhanced machining of hard-to-machine materials- A review, International Journal of Machine Tools and Manufacture, Vol. 50, (2010), p. 663-680
Wang: Titanium alloys and their machinability-a review, Journal of Materials Processing Technology, Vol. 68, (1997) p. 262-274
Celaya: Plasma assisted milling of heat-resistant superalloys, Journal of Manufacturing Science and Engineering, Vol. 126(2) (2004), p. 274-285
Nurul Amin: The performance of uncoated tungsten carbide insert in end milling titanium alloy Ti-6Al-4V through workpiece preheating, American Journal of Engineering and Applied Sciences Vol. 2(1) (2009), p.147-153
Karim: Enhancement of machinability by workpiece preheating in end milling of Ti-6Al-4V, Journal of Achievements in Materials and Manufacturing Engineering, Vol. 31(2) (2008), p. 320-326

Introduction Mn-Zn ferrites play an important role in the area of electronic materials.
Conglomeration of nano-particles has been deemed as one of the main obstacles in the preparation of nano-materials.
Journal of Magnetism and Magnetic Materials, Vol. 202 (1999)p. 77-84 [9].
Nanometer Compound Materials, (Chemical industry press, China 2002) [14].
Materials Research Bulletin, Vol. 39 (2004)p513-521

Introduction Multiferroics are the multifunctional materials which exhibits coexistence of at least two of ferroelectricity, ferromagnetism and ferroelasticity in a certain temperature range[1].
Especially for the new information storage, the magnetoelectric coupling in multiferroics can overcome the effect of fatigue properties in polarization reversion of multiferroic materials, and provide more flexibility and freedom of structural design[2-3].
Raman spectroscopy has been demonstrated to be a very useful technique in studying phase transitional characteristics and local structure modulation in ferroelectric materials.
Das: Journal of Applied Physics, Vol. 119 (2016) No.23, p. 234102
Awan: Progress in Natural Science: Materials International, Vol. 23 (2013) No. 5, p.487

Introduction Nowadays, polymer thin films play an increasingly significant role in technological application ranging from coatings, adhesives and lithography to organic light emitting diodes and various organic materials based devices [1].
Besides, PMMA is one of the hardest thermoplastics and the transparent thermoplastic materials of PMMA have been utilized to make windows, lenses, and the other optical devices [4].
[4] Xiangfu Meng, Zhiwei Zhang, , Nan Luo, Transparent Poly(methyl methacrylate)/TiO2 Nanocomposites for UV-shielding Applications, Advanced Materials Research, 239-242 (2011) 1129-1136
Baghery, Morphological And Thickness Analysis For Pmma Spin Coated Films, Journal Of Optoelectronics And Advanced Materials, 9 (2007) 3901-3906
Fahmi, Investigation of Vibration and Surface Roughness in Micro Milling of PMMA, Applied Mechanics and Materials, 217-219 (2012) 2187-2193

Kiminami: Journal of Materials Synthesis and Processing, v. 9 (2002), p. 347
Murthy (Eds.), Ferrite Materials, Science and Technology, (Springer, New Delhi, 1990), p. 85
Shah: Journal of Magnetism and Magnetic Materials, v. 163 (1996), p.243
Primet: Journal Chemical Science.
Bahadur, Journal of Magnetism and Magnetic Materials. 293 (2005), p. 55

Introduction During the last decade tellurite glass has been an interesting research subject in science and technology.
Abbas Ahmed, New tellurite glass: Optical properties, Materials Chemistry and Physics.109 (2008) 291-296
Indonesian Journal of Applied Physics 2 (2012) 151-153
Reactive Index and Optical Properties, Journal of Optoeletronics and Advanced Materials 6 (2004) 747-753
Wan-Yusof, Optical Properties of Bismuth Tellurite Based Glass, International Journal of Molecular Sciences 13 (2012) 4623-4631.

School of Material Science and Engineering, Henan University of Science and Technology, LuoYang 471003,China 3.Henan Laboratory for Material damage and Tribology, LuoYang 471003,China ayangguangyingyu@163.com, byzzhang@mail.haust.edu.cn, cchenyue@mail.haust.edu.cn Key words: DC magnetic field，magnetic field intensity，super-paramagnetic Abstract: The influence of DC steady magnetic field on dry-sliding friction and wear characteristics of friction pair of high-speed steel (HSS) ring / Ti6Al4V pin is studied by use of improved MPV-1500 type under normal temperature.
It is shown that the wear loss of ferromagnetic materials can be decreased by applying a steady magnetic field.
Frene: Applied Surface Science.
LIN: Journal of Harbin Medical University.
SHAN: The Chinese Journal of Process Engineering.