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ホットプレス法によるMgB2バルクの作製と組織評価

机译:热压法制备MgB2块体及其微观结构评价

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MgB_(2) bulks have been prepared by hot pressing method in order to fabricate high density MgB_(2) structure. Mixed Mg and B powder were enclosed in stainless steel mold. The bulk samples were treated at 850°C for 3 h under 30-300 MPa in Ar gas atmosphere. The hot pressed sample size is 20 mm in diameter and 5.6~10 mm in thickness. The XRD patterns of the bulks show that MgB_(2) phase is synthesized and dominant with small amount of MgO in the whole range of 0~300 MPa. The density of the bulks increased with increasing hot pressing pressure, and reached a peak of 2.34 g/cm~(3) at 200 MPa which corresponded to the relative density of 90 %.
机译:为了制造高密度的MgB_(2)结构,已经通过热压法制备了MgB_(2)块。将混合的Mg和B粉末封入不锈钢模具中。将大块样品在Ar气氛中在850°C和30-300 MPa下处理3小时。热压样品的直径为20毫米,厚度为5.6〜10毫米。块体的X射线衍射图谱表明,在0〜300 MPa的整个范围内,MgB_(2)相被合成并占主导地位,少量的MgO存在。堆密度随热压压力的增加而增加,在200 MPa时达到2.34 g / cm〜(3)的峰值,相当于90%的相对密度。

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