Amorphization of Nd15Fe77B8 alloy ingots by mechanical grinding
Amorphization of Nd15Fe77B8 alloy ingots by mechanical grinding
复制标题
机械磨削Nd15Fe77B8合金锭的非晶化
DOI：
10.1063/1.351986
复制
发表时间：
1992
影响因子：
3.2
通讯作者：
T. Kuji
中科院分区：
文献类型：
--
作者：
T. Harada;T. Kuji
对Nd15Fe77B8合金的铸锭进行机械磨削，得到了非晶态粉末。机械磨削可使Nd15Fe7B8合金锭在较短的铣削时间内平均粒径减小到1 μm。延长磨矿时间后，晶粒尺寸并未进一步减小，但结构由Nd2Fe14B晶转变为非晶结构。结果表明，在铣削过程的某一阶段，非晶态基体中的α铁发生了结晶。当升温速率为0.33 K/s时，非晶材料在820 K温度下保持稳定。在结晶温度以上对非晶态材料进行热处理后，Nd2Fe14B晶化，所得材料的矫顽力高达11.9 kOe，与采用快速淬火技术制备的非晶态Nd - Fe - B材料相同。
Amorphous powders of a Nd15Fe77B8 alloy were obtained by mechanical grinding of the alloy ingots. Mechanical grinding of Nd15Fe7B8 alloy ingots reduced the average particle size to 1 μm within the relatively short period of milling times. Extended milling did not yield further reduction in particle size, but resulted in a change in the structures from Nd2Fe14B crystallites to an amorphous structure. It was found that the crystallization of α‐iron from amorphous matrix took place in some stage of milling. The amorphous materials were stable up to 820 K at a heating rate of 0.33 K/s. Heat treatment of the amorphous materials above the crystallization temperature resulted in the crystallization of the Nd2Fe14B phase and the resultant materials showed a high coercivity of 11.9 kOe as in the case for the amorphous Nd‐Fe‐B materials produced by rapid quenching techniques.
影响因子：
3.2
作者：
SAGAWA, M;FUJIMURA, S;MATSUURA, Y
通讯作者：
MATSUURA, Y