光伏切割用稀土强化钨合金的制备与力学性能研究

Preparation and Mechanical Properties of Rare Earth Reinforced Tungsten Alloys for Slicing in Photovoltaic Industry

基于光伏切割用金刚线钨基母线的要求,采用固液掺杂法,结合中间机械预处理技术,制备出高性能稀土钨合金粉,并对比研究了3种典型稀土氧化物(氧化镧、氧化钇和氧化铈)对烧结坯致密度与力学性能的影响。结果表明:中间机械预处理可以显著减小第二相和钨基体的晶粒尺寸,提高烧结活性,获得了高致密度;与纯钨相比,稀土氧化物的添加均能提高力学性能,其中氧化钇的强化效果最佳,所得氧化钇强化钨合金的抗拉强度和抗压强度为177 MPa和2280 MPa,较纯钨分别提高31.6%和35.7%。

To meet the requirements of tungsten based generatrix for diamond wires used in photovoltaic cutting,high performance rare earth reinforced tungsten alloy powder was prepared by a solid-liquid doping method associated with an intermediate mechanical pretreatment technique,and the effects of three typical rare earth oxides(La_(2)O_(3),Y_(2)O_(3) and CeO_(2))on the compactness and mechanical properties of sintered billets were also compared.It is found that the intermediate mechanical pretreatment can significantly reduce the grain size of the second phase and tungsten matrix,improve the sintering activity,and obtain high density.Compared to pure tungsten,the addition of rare earth oxides can enhance the mechanical properties,and the strengthening effect of yttrium oxide is the best.The as-obtained Y_(2)O_(3) reinforced tungsten alloy exhibits a tensile strength of 177 MPa and a compressive strength of 2280 MPa,which are 31.6% and 35.7% higher than those of pure tungsten,respectively.