锆基非晶复合材料的增材制造技术，因其可突破传统加工方法对复杂构件的成形限制，在精密器件制造领域展现出独特优势。然而，由于粉末和成形气氛中不可避免地存在氧杂质，从而对成形件组织和性能产生影响。本工作选择2种不同工艺制备Zr₄₈Cu_46.25Al₄Ag₁Sn_0.75合金粉末，并分别在不同真空度下进行激光粉末床熔融(L-PBF)成形。研究了不同粉末状态及L-PBF成形气氛O含量对合金微观组织与力学性能的影响。结果表明，真空感应气体雾化(VIGA)法制取的合金粉末O含量高达1700 ´ 10^-6，在500 ´ 10^-6的低真空气氛下L-PBF成形，晶化现象严重，脆性金属间化合物(AlZr₂等)大量析出。在低于100 ´ 10^-6的高真空气氛下L-PBF成形，晶化行为和脆性金属间化合物析出得到一定程度的抑制，然而压缩变形过程中仍然发生脆性断裂。采用等离子旋转电极法(PREP)制备的粉末O含量较低(约570 ´ 10^-6)，在低于100 ´ 10^-6的高真空气氛下经L-PBF成形，非晶形成能力较高，热影响区晶化相主要为韧性B2-CuZr相，而脆性金属间化合物的出现基本得到抑制。当L-PBF成形能量密度为34 J/mm³时，合金的压缩断裂强度高达1973 MPa，并仍具有约6%的压缩应变。

The additive manufacturing technology of Zr-based bulk metallic glass composites demonstrates unique advantages in the field of precision device manufacturing, owing to its capability to overcome the forming constraints of complex components imposed by traditional processing methods. However, the inevitable presence of oxygen impurities in the powder and forming atmosphere, may have an adverse impact on the microstructure and properties of the formed parts. In this study, two different processes were selected to prepare Zr₄₈Cu_46.25Al₄Ag₁Sn_0.75 alloy powders. The powders were formed by laser powder bed fusion (L-PBF) under different vacuum conditions. The influence of different powder states and oxygen contents in the L-PBF forming atmosphere on the microstructure and mechanical properties of the alloys was studied. Results indicated that the oxygen content of the alloy prepared by vacuum induction gas atomization (VIGA) was as high as 1700 ´ 10^-6. The crystallization of the VIGA powders was serious after L-PBF formation under a low vacuum atmosphere of 500 ´ 10^-6, and a large amount of brittle intermetallic compounds (AlZr₂, etc.) were precipitated. When the L-PBF formation of the VIGA powders was conducted in a high vacuum atmosphere below 100 ´ 10^-6, the crystallization behavior and precipitation of brittle intermetallic compounds were slightly suppressed. However, a brittle fracture still occurred during compression deformation. The powders prepared by the plasma rotating electrode process (PREP) had a low oxygen content (approximately 570 ´ 10^-6). When the L-PBF formation of the PREP powders was conducted in a high-vacuum atmosphere below 100 ´ 10^-6, the glass-forming ability of the alloy was high. The crystalline phase that forms in the heat-affected zone during crystallization was the B2-CuZr phase, whereas the precipitation of brittle intermetallic compounds was basically suppressed. When the energy density of the L-PBF formation was 34 J/mm³, the compressive strength of the alloy was 1973 MPa, whereas the compressive strain remained about 6%.